var bricktype = new Array();bricktype[0] = "Fastwall";bricktype[1] = "Metro Federation Lst 290x90x160";bricktype[2] = "Midland Long Reach";bricktype[3] = "Midland Maxis";bricktype[4] = "Midland Random Unit A";bricktype[5] = "Midland Random Unit B";bricktype[6] = "Midland Random Unit C";bricktype[7] = "Non-Std 230x110x119";bricktype[8] = "Non-Std 230x150x76";bricktype[9] = "Non-Std 290x150x90";bricktype[10] = "Non-Std 290x90x90";bricktype[11] = "Non-Std 305x90x119";bricktype[12] = "Recon Lst 400x300x190";bricktype[13] = "Recon Lst 500x350x110";bricktype[14] = "Recon Lst 500x350x240";bricktype[15] = "Std 230x110x76";bricktype[16] = "Std wide 230x110x90";bricktype[17] = "Verticore";var bricklength = new Array();bricklength[0] = 305;bricklength[1] = 290;bricklength[2] = 305;bricklength[3] = 305;bricklength[4] = 290;bricklength[5] = 290;bricklength[6] = 140;bricklength[7] = 230;bricklength[8] = 230;bricklength[9] = 290;bricklength[10] = 290;bricklength[11] = 305;bricklength[12] = 400;bricklength[13] = 500;bricklength[14] = 500;bricklength[15] = 110;bricklength[16] = 230;bricklength[17] = 305; var brickwidth = new Array();brickwidth[0] = 90;brickwidth[1] = 90;brickwidth[2] = 90;brickwidth[3] = 90;brickwidth[4] = 90;brickwidth[5] = 90;brickwidth[6] = 90;brickwidth[7] = 110;brickwidth[8] = 150;brickwidth[9] = 150;brickwidth[10] = 90;brickwidth[11] = 90;brickwidth[12] = 190;brickwidth[13] = 350;brickwidth[14] = 350;brickwidth[15] = 76;brickwidth[16] = 110;brickwidth[17] = 90;var brickheight = new Array();brickheight[0] = 162;brickheight[1] = 160;brickheight[2] = 76;brickheight[3] = 162;brickheight[4] = 119;brickheight[5] = 248;brickheight[6] = 248;brickheight[7] = 119;brickheight[8] = 76;brickheight[9] = 90;brickheight[10] = 90;brickheight[11] = 119;brickheight[12] = 300;brickheight[13] = 110;brickheight[14] = 240;brickheight[15] = 10;brickheight[16] = 90;brickheight[17] = 162;var bed = new Array();bed[0] = 10;bed[1] = 10;bed[2] = 10;bed[3] = 10;bed[4] = 10;bed[5] = 10;bed[6] = 10;bed[7] = 10;bed[8] = 10;bed[9] = 10;bed[10] = 10;bed[11] = 10;bed[12] = 25;bed[13] = 20;bed[14] = 25;bed[15] = 10;bed[16] = 10;bed[17] = 10;var perp = new Array();perp[0] = 10;perp[1] = 10;perp[2] = 10;perp[3] = 10;perp[4] = 10;perp[5] = 10;perp[6] = 10;perp[7] = 10;perp[8] = 10;perp[9] = 10;perp[10] = 10;perp[11] = 10;perp[12] = 25;perp[13] = 20;perp[14] = 25;perp[15] = 10;perp[16] = 10;perp[17] = 10;/********************************//* Defind mix mortar , and      *//* its kg, bulkD, SpecG         *//********************************/var mixmortar = new Array();mixmortar[0] = "Cockburn Brickies Grey 17.85kg bag";mixmortar[1] = "Cockburn Brickies Lite 17.85kg bag";mixmortar[2] = "Cockburn Crème 40kg bag";mixmortar[3] = "Cockburn Crème 20kg bag";mixmortar[4] = "Cockburn Crème (HE) 40kg bag";mixmortar[5] = "Cockburn GP 40kg bag";mixmortar[6] = "Cockburn GP 20kg bag";mixmortar[7] = "Cockburn HE 40kg bag";mixmortar[8] = "Cockburn Hylime 20kg bag";mixmortar[9] = "Cockburn Masonry 40kg bag";mixmortar[10] = "Cockburn Plasterers Dark 27.8kg bag";mixmortar[11] = "Cockburn mGP 40kg bag";mixmortar[12] = "Swan GP 40kg bag";mixmortar[13] = "Swan GP 20kg bag";mixmortar[14] = "Swan BuilderSwan Cement 40kg bag";mixmortar[15] = "Swan Masonry 40kg bag";mixmortar[16] = "Swan Marvelime 20kg bag";mixmortar[17] = "Swan Brightonlite 40kg bag";mixmortar[18] = "Swan Brightonlite 20kg bag";mixmortar[19] = "Swan 50/50 Grey 20kg bag";mixmortar[20] = "Swan 50/50 Crème 20kg bag";mixmortar[21] = "Knight White 40kg bag";mixmortar[22] = "Swan High Early 40kg bag";mixmortar[23] = "Swan Low Heat 40kg bag";mixmortar[24] = "2Swan Low Heat 20kg bag";mixmortar[25] = "None";var mixkg = new Array();mixkg[0] = 17.85;mixkg[1] = 17.85;mixkg[2] = 40;mixkg[3] = 20;mixkg[4] = 40;mixkg[5] = 40;mixkg[6] = 20;mixkg[7] = 40;mixkg[8] = 20;mixkg[9] = 40;mixkg[10] = 27.8;mixkg[11] = 40;mixkg[12] = 40;mixkg[13] = 20;mixkg[14] = 40;mixkg[15] = 40;mixkg[16] = 20;mixkg[17] = 40;mixkg[18] = 20;mixkg[19] = 20;mixkg[20] = 20;mixkg[21] = 40;mixkg[22] = 40;mixkg[23] = 40;mixkg[24] = 20;mixkg[25] = 0.00001;var mixbulkD = new Array();mixbulkD[0] = 0.95;mixbulkD[1] = 0.95;mixbulkD[2] = 1.3;mixbulkD[3] = 1.3;mixbulkD[4] = 1.3;mixbulkD[5] = 1.3;mixbulkD[6] = 1.3;mixbulkD[7] = 1.3;mixbulkD[8] = 0.48;mixbulkD[9] = 1.25;mixbulkD[10] = 1.07;mixbulkD[11] = 1.2;mixbulkD[12] = 1.3;mixbulkD[13] = 1.3;mixbulkD[14] = 1.5;mixbulkD[15] = 1.25;mixbulkD[16] = 0.48;mixbulkD[17] = 1.3;mixbulkD[18] = 1.3;mixbulkD[19] = 0.95;mixbulkD[20] = 0.95;mixbulkD[21] = 1.25;mixbulkD[22] = 1.3;mixbulkD[23] = 1.4;mixbulkD[24] = 1.4;mixbulkD[25] = 0.00001;var mixSpecG = new Array();mixSpecG[0] = 2.91;mixSpecG[1] = 2.91;mixSpecG[2] = 3.12;mixSpecG[3] = 3.1;mixSpecG[4] = 3.1;mixSpecG[5] = 3.1;mixSpecG[6] = 3.12;mixSpecG[7] = 3.12;mixSpecG[8] = 2.3;mixSpecG[9] = 3.04;mixSpecG[10] = 3.06;mixSpecG[11] = 3.14;mixSpecG[12] = 3.12;mixSpecG[13] = 3.12;mixSpecG[14] = 3.04;mixSpecG[15] = 3.04;mixSpecG[16] = 2.3;mixSpecG[17] = 3.12;mixSpecG[18] = 3.12;mixSpecG[19] = 2.91;mixSpecG[20] = 2.91;mixSpecG[21] = 3.14;mixSpecG[22] = 3.12;mixSpecG[23] = 2.97;mixSpecG[24] = 2.97;mixSpecG[25] = 0.00001;var mixsand = new Array();mixsand[0] = "Brickies Sand";var mixsandB = new Array();mixsandB[0] = 1.45;var mixsandS = new Array();mixsandS[0] = 2.65;var mixsandP = new Array();mixsandP[0] = 20;function insertlist(){ TheForm = document.Calculator;  for (i=0;i<bricktype.length;i++) {  TheForm.bricktype.options[i] = new Option(bricktype[i],bricktype[i]); }  for (i=0;i<mixmortar.length;i++) {  TheForm.mortar1.options[i] = new Option(mixmortar[i],mixmortar[i]);  TheForm.mortar2.options[i] = new Option(mixmortar[i],mixmortar[i]); }  for (i=0;i<mixsand.length;i++) {  TheForm.mortar3.options[i] = new Option(mixsand[i],mixsand[i]); }   TheForm.bricktype.selectedIndex = -1;  TheForm.mortar1.selectedIndex = -1;  TheForm.mortar2.selectedIndex = -1;  TheForm.mortar3.selectedIndex = -1;  TheForm.bricklength.value = "";  TheForm.brickwidth.value = "";  TheForm.brickheight.value = "";  TheForm.mortarperps.value = "";  TheForm.mortarbed.value = "";  TheForm.Lmortar.value = "";  TheForm.Emortar.value = "";  TheForm.Lrender.value = "";  TheForm.Erender.value = "";  TheForm.m2render.value = "";  TheForm.Numbrick.value = "";  TheForm.water.value = "1";  TheForm.cement.value = "1";  TheForm.wc.value = "1";  TheForm.water2.value = "12";  TheForm.cement2.value = "0.88";  TheForm.bulkD1.value = "";  TheForm.RelD1.value ="";  TheForm.mix1.value = "1";  TheForm.vol1.value = "";  TheForm.bulkD2.value = "";  TheForm.RelD2.value ="";  TheForm.mix2.value = "1";  TheForm.vol2.value = "";  TheForm.bulkD3.value = "";  TheForm.RelD3.value ="";  TheForm.mix3.value = "6";  TheForm.vol3.value = "";  TheForm.BagSize1.value = "";  TheForm.BagSize2.value = "";  TheForm.totvol.value = "";  TheForm.totwater.value = "";  TheForm.totair.value = "";  TheForm.total.value = "";  TheForm.name1.value = "";  TheForm.name1a.value = "";  TheForm.name2.value = "";  TheForm.name2a.value = "";  TheForm.name3.value = "";  TheForm.name3a.value = "";  TheForm.name4.value = "";  TheForm.name4a.value = "";  TheForm.result0.value = "";  TheForm.result0a.value = "";  TheForm.result1.value = "";  TheForm.result1a.value = "";  TheForm.result2.value = "";  TheForm.result2a.value = "";  TheForm.result3.value = "";  TheForm.result3a.value = "";  TheForm.result4.value = "";  TheForm.result4a.value = "";}function getbricksize(ind){ document.Calculator.bricklength.value = bricklength[ind]; document.Calculator.brickwidth.value = brickwidth[ind]; document.Calculator.brickheight.value = brickheight[ind]; document.Calculator.mortarperps.value = perp[ind]; document.Calculator.mortarbed.value = bed[ind];  var length; var width; var height; var mortarperps; var mortarbed; var Lmortar; var waste1; var Emortar; var m2render;  length = document.Calculator.bricklength.value * 1; width  = document.Calculator.brickwidth.value * 1; height = document.Calculator.brickheight.value * 1; mortarperps = document.Calculator.mortarperps.value * 1; mortarbed = document.Calculator.mortarbed.value * 1; waste1 = document.Calculator.waste1.value * 1; Lmortar = ((((length+mortarperps)*width)*mortarbed)+(((height+mortarbed)*width)*mortarperps)+(mortarperps*mortarbed*width))/1000000; Emortar = Lmortar * ((100-waste1)/100); m2render = (length/1000+mortarperps/1000)*(height/1000+mortarbed/1000);  document.Calculator.Lmortar.value = Lmortar; document.Calculator.Emortar.value = Math.round(Emortar*10000)/10000  ; document.Calculator.m2render.value = Math.round(m2render*1000)/1000; document.Calculator.Lrender.value = ""; document.Calculator.Erender.value = ""; document.Calculator.Numbrick.value = "";  document.Calculator.result0.value = ''; document.Calculator.result0a.value = ''; document.Calculator.result1.value = ''; document.Calculator.result1a.value = ''; document.Calculator.result2.value = ''; document.Calculator.result2a.value = ''; document.Calculator.result3.value = ''; document.Calculator.result3a.value = ''; document.Calculator.result4.value = ''; document.Calculator.result4a.value = ''; }function validate_renderdepth(){    if (document.Calculator.bricktype.value == "" || document.Calculator.bricktype.selectedIndex < 0) { alert("Please select brick type !"); document.Calculator.bricktype.focus(); return false; }      if (document.Calculator.renderdepth.value == '') {alert("Please enter render depth !"); document.Calculator.renderdepth.focus();    return false; }if(isNaN(document.Calculator.renderdepth.value)){alert("Please enter only a numeric value for render depth.");document.Calculator.renderdepth.focus();return false;}var Lrender;var Erender;var m2render = document.Calculator.m2render.value * 1;var renderdepth = document.Calculator.renderdepth.value * 1;var waste2 = document.Calculator.waste2.value * 1;Lrender = m2render*renderdepth/1000*1000; Erender = Lrender * ((100-waste2)/100);document.Calculator.Lrender.value = Lrender;document.Calculator.Erender.value = Math.round(Erender*1000)/1000;return true;}function validate_M2brickwork(){    if (document.Calculator.bricktype.value == '' || document.Calculator.bricktype.selectedIndex < 0) { alert("Please select brick type !"); document.Calculator.bricktype.focus(); return false; }if (document.Calculator.M2.value == '') {alert("Please enter M2 of brickwork !"); document.Calculator.M2.focus();    return false; }if(isNaN(document.Calculator.M2.value)){alert("Please enter only a numeric value for M2 of brickwork.");document.Calculator.M2.focus();return false;}var Numbrick;var M2 = document.Calculator.M2.value * 1;var m2render = document.Calculator.m2render.value * 1;Numbrick = (M2/m2render);    document.Calculator.Numbrick.value = Math.round(Numbrick*1)/1;if (document.Calculator.mortar1.selectedIndex >= 0 || document.Calculator.mortar2.selectedIndex >= 0 || document.Calculator.mortar3.selectedIndex >= 0){ var Lmortar = document.Calculator.Lmortar.value * 1;var waste1 = document.Calculator.waste1.value * 1;var Lrender = document.Calculator.Lrender.value * 1;var waste2 = document.Calculator.waste2.value * 1;var total = document.Calculator.total.value * 1;var mix1 = document.Calculator.mix1.value * 1;var mix2 = document.Calculator.mix2.value * 1;var mix3 = document.Calculator.mix3.value * 1;var bulkD1 = document.Calculator.bulkD1.value * 1;var bulkD2 = document.Calculator.bulkD2.value * 1;var bulkD3 = document.Calculator.bulkD3.value * 1;var bagsize1 = document.Calculator.BagSize1.value * 1;var bagsize2 = document.Calculator.BagSize1.value * 1;var result0;var result0a;var result1;var result1a;var result3;var result3a;var result4;var result4a;result0  = ( Numbrick * Lmortar / ((100-waste1)/100) ) / total;    result0a = ( Numbrick * Lrender / ((100-waste2)/100) ) / total;result1  = (result0 * mix1) * bulkD1 / bagsize1;    result1a = (result0a * mix1) * bulkD1 / bagsize1;    result2  = (result0 * mix2) * bulkD2 / bagsize2;    result2a = (result0a * mix2) * bulkD2 / bagsize2;    result3  = (result0 * mix3 * bulkD3);    result3a  = (result0a * mix3 * bulkD3);    result4  = result3 / (bulkD3 * 1000);    result4a  = result3a / (bulkD3 * 1000);    document.Calculator.result0.value = Math.round(result0 * 1) /1;    document.Calculator.result0a.value = Math.round(result0a * 1) /1;    document.Calculator.result1.value = Math.round(result1 * 10) /10;    document.Calculator.result1a.value = Math.round(result1a * 1) /1;    document.Calculator.result2.value = Math.round(result2 * 10) /10;    document.Calculator.result2a.value = Math.round(result2a * 1) /1;    document.Calculator.result3.value = Math.round(result3 * 1) /1;    document.Calculator.result3a.value = Math.round(result3a * 1) /1;    document.Calculator.result4.value = Math.round(result4 * 100) /100;    document.Calculator.result4a.value = Math.round(result4a * 100) /100;    }else   {   document.Calculator.result0.value = "";document.Calculator.result0a.value = "";   }   return true;}function validate_wc(){if (document.Calculator.water.value == '') {alert("Please enter water ratio !"); document.Calculator.water.focus();    return false; }if(isNaN(document.Calculator.water.value)){alert("Please enter only a numeric value for water ratio.");document.Calculator.water.focus();return false;}if (document.Calculator.cement.value == '') {alert("Please enter cement ratio !"); document.Calculator.cement.focus();    return false; }if(isNaN(document.Calculator.cement.value)){alert("Please enter only a numeric value for cement ratio.");document.Calculator.cement.focus();return false;}var wc;var water = document.Calculator.water.value * 1;var cement = document.Calculator.cement.value * 1;wc = (water/cement);    document.Calculator.wc.value = Math.round(wc*100)/100;if (document.Calculator.mortar1.selectedIndex >= 0 || document.Calculator.mortar2.selectedIndex >= 0){ calculate_mixtotal(); }else{ clear_mixtotal(); }return true;}function validate_aircontent(){if (document.Calculator.water2.value == '') {alert("Please enter water ratio !"); document.Calculator.water2.focus();    return false; }if(isNaN(document.Calculator.water2.value)){alert("Please enter only a numeric value for water ratio.");document.Calculator.water2.focus();return false;}var cement2;var water2 = document.Calculator.water2.value * 1;cement2 = ((100-water2)/100);    document.Calculator.cement2.value = Math.round(cement2*100)/100;if (document.Calculator.mortar1.selectedIndex >= 0 || document.Calculator.mortar2.selectedIndex >= 0){ calculate_mixtotal(); }else{ clear_mixtotal(); }return true;}function getmixinfo1(ind){ var vol1; var mix1; var bulkD; var SpecG;  document.Calculator.bulkD1.value = mixbulkD[ind]; document.Calculator.RelD1.value = mixSpecG[ind]; document.Calculator.BagSize1.value = mixkg[ind]; document.Calculator.name1.value = document.Calculator.mortar1[ind].value; document.Calculator.name1a.value = document.Calculator.mortar1[ind].value;  document.Calculator.vol1.value = ''; clear_mixtotal();} function getmixinfo2(ind){ var vol2; var mix2; var bulkD; var SpecG;  document.Calculator.bulkD2.value = mixbulkD[ind]; document.Calculator.RelD2.value = mixSpecG[ind]; document.Calculator.BagSize2.value = mixkg[ind]; document.Calculator.name2.value = document.Calculator.mortar2[ind].value; document.Calculator.name2a.value = document.Calculator.mortar2[ind].value;  document.Calculator.vol2.value = ''; clear_mixtotal();}  function getmixinfo3(ind){ var vol3; var mix3; var bulkD; var SpecG;  document.Calculator.bulkD3.value = mixsandB[ind]; document.Calculator.RelD3.value = mixsandS[ind]; document.Calculator.name3.value = document.Calculator.mortar3[ind].value; document.Calculator.name3a.value = document.Calculator.mortar3[ind].value; document.Calculator.name4.value = document.Calculator.mortar3[ind].value; document.Calculator.name4a.value = document.Calculator.mortar3[ind].value;  document.Calculator.vol3.value = ''; clear_mixtotal();}  function validate_vol1(){    if (document.Calculator.mortar1.value == '' || document.Calculator.mortar1.selectedIndex < 0) { alert("Please select mortar !"); document.Calculator.mortar1.focus(); return false; }if (document.Calculator.mix1.value == '') {alert("Please enter mix number !"); document.Calculator.mix1.focus();    return false; }if(isNaN(document.Calculator.mix1.value)){alert("Please enter only a numeric value for mix number.");document.Calculator.mix1.focus();return false;}var vol1;var bulkD = document.Calculator.bulkD1.value * 1;    var SpecG = document.Calculator.RelD1.value * 1;var mix1 = document.Calculator.mix1.value * 1;vol1 = mix1 * (bulkD / SpecG);    document.Calculator.vol1.value = Math.round(vol1*100)/100;calculate_mixtotal();return true;}function validate_vol2(){    if (document.Calculator.mortar2.value == '' || document.Calculator.mortar2.selectedIndex < 0) { alert("Please select mortar !"); document.Calculator.mortar2.focus(); return false; }if (document.Calculator.mix2.value == '') {alert("Please enter mix number !"); document.Calculator.mix2.focus();    return false; }if(isNaN(document.Calculator.mix2.value)){alert("Please enter only a numeric value for mix number.");document.Calculator.mix2.focus();return false;}var vol2;var bulkD = document.Calculator.bulkD2.value * 1;    var SpecG = document.Calculator.RelD2.value * 1;var mix2 = document.Calculator.mix2.value * 1;vol2 = mix2 * (bulkD / SpecG);    document.Calculator.vol2.value = Math.round(vol2*100)/100;    calculate_mixtotal();return true;}function validate_vol3(){    if (document.Calculator.mortar3.value == '' || document.Calculator.mortar3.selectedIndex < 0) { alert("Please select mortar !"); document.Calculator.mortar3.focus(); return false; }if (document.Calculator.mix3.value == '') {alert("Please enter mix number !"); document.Calculator.mix3.focus();    return false; }if(isNaN(document.Calculator.mix3.value)){alert("Please enter only a numeric value for mix number.");document.Calculator.mix3.focus();return false;}var vol3;var bulkD = document.Calculator.bulkD3.value * 1;    var SpecG = document.Calculator.RelD3.value * 1;var mix3 = document.Calculator.mix3.value * 1;vol3 = mix3 * (bulkD / SpecG);    document.Calculator.vol3.value = Math.round(vol3*100)/100;    calculate_mixtotal();return true;}function calculate_mixtotal(){var totvol;var totwater;var totair;var total;var airfactor;var mix1 = document.Calculator.mix1.value * 1;var mix2 = document.Calculator.mix1.value * 1;var mix3 = document.Calculator.mix3.value * 1;var bulkD1 = document.Calculator.bulkD1.value * 1;var bulkD2 = document.Calculator.bulkD2.value * 1;var bulkD3 = document.Calculator.bulkD3.value * 1;var wc = document.Calculator.wc.value * 1;var airfactor = document.Calculator.cement2.value * 1;totvol = (document.Calculator.vol1.value *1) + (document.Calculator.vol2.value *1) + (document.Calculator.vol3.value *1) ; totwater = ((mix1 * bulkD1) + (mix2 * bulkD2)) * wc;total = (totvol + totwater) / airfactor;totair = total - (totvol + totwater);document.Calculator.totvol.value = Math.round(totvol * 100) /100; document.Calculator.totwater.value = Math.round(totwater * 100) /100; document.Calculator.total.value = Math.round(total * 100) /100; document.Calculator.totair.value = Math.round(totair * 100) /100;var Numbrick = document.Calculator.Numbrick.value * 1;var Lmortar = document.Calculator.Lmortar.value * 1;var waste1 = document.Calculator.waste1.value * 1;var Lrender = document.Calculator.Lrender.value * 1;var waste2 = document.Calculator.waste2.value * 1;var bagsize1 = document.Calculator.BagSize1.value * 1;var bagsize2 = document.Calculator.BagSize2.value * 1;var result0;var result0a;var result1;var result1a;var result3;var result3a;var result4;var result4a;result0  = ( Numbrick * Lmortar / ((100-waste1)/100) ) / total;result0a = ( Numbrick * Lrender / ((100-waste2)/100) ) / total;result1  = (result0 * mix1) * bulkD1 / bagsize1;result1a = (result0a * mix1) * bulkD1 / bagsize1;result2  = (result0 * mix2) * bulkD2 / bagsize2;result2a = (result0a * mix2) * bulkD2 / bagsize2;result3  = (result0 * mix3 * bulkD3);result3a  = (result0a * mix3 * bulkD3);result4  = result3 / (bulkD3 * 1000);result4a  = result3a / (bulkD3 * 1000);document.Calculator.result0.value = Math.round(result0 * 1) /1;document.Calculator.result0a.value = Math.round(result0a * 1) /1;document.Calculator.result1.value = Math.round(result1 * 10) /10;document.Calculator.result1a.value = Math.round(result1a * 1) /1;document.Calculator.result2.value = Math.round(result2 * 10) /10;document.Calculator.result2a.value = Math.round(result2a * 1) /1;document.Calculator.result3.value = Math.round(result3 * 1) /1;document.Calculator.result3a.value = Math.round(result3a * 1) /1;document.Calculator.result4.value = Math.round(result4 * 100) /100;document.Calculator.result4a.value = Math.round(result4a * 100) /100;}function clear_mixtotal(){  document.Calculator.totvol.value = '';  document.Calculator.totwater.value = '';  document.Calculator.total.value = '';  document.Calculator.totair.value = '';  document.Calculator.result0.value = '';  document.Calculator.result0a.value = '';  document.Calculator.result1.value = '';  document.Calculator.result1a.value = '';  document.Calculator.result2.value = '';  document.Calculator.result2a.value = '';  document.Calculator.result3.value = '';  document.Calculator.result3a.value = '';  document.Calculator.result4.value = '';  document.Calculator.result4a.value = '';}function validate_imperial(){ if (document.Calculator.B3.value == '') {alert("Please enter length !"); document.Calculator.B3.focus();    return false; } if(isNaN(document.Calculator.B3.value)){alert("Please enter only a numeric value for length.");document.Calculator.B3.focus();return false;} if (document.Calculator.D3.value == '') {alert("Please enter width !"); document.Calculator.D3.focus();    return false; } if(isNaN(document.Calculator.D3.value)){alert("Please enter only a numeric value for width.");document.Calculator.D3.focus();return false;} if (document.Calculator.F3.value == '') {alert("Please enter depth !"); document.Calculator.F3.focus();    return false; } if(isNaN(document.Calculator.F3.value)){alert("Please enter only a numeric value for depth.");document.Calculator.F3.focus();return false;} if (document.Calculator.F6.value == '') {alert("Please enter ft3 !"); document.Calculator.F6.focus();    return false; } if(isNaN(document.Calculator.F6.value)){alert("Please enter only a numeric value for ft3.");document.Calculator.F6.focus();return false;} if (document.Calculator.F7.value == '') {alert("Please enter yard3 !"); document.Calculator.F7.focus();    return false; } if(isNaN(document.Calculator.F7.value)){alert("Please enter only a numeric value for yard3.");document.Calculator.F7.focus();return false;} var B3 = document.Calculator.B3.value * 1; var D3 = document.Calculator.D3.value * 1; var F3 = document.Calculator.F3.value * 1;  var B4 = document.Calculator.B4.value * 1; var D4 = document.Calculator.D4.value * 1; var F4 = document.Calculator.F4.value * 1;  var F6 = document.Calculator.F6.value * 1; var F7 = document.Calculator.F7.value * 1;    var B5; var B6; var H4;  B5 = B3 * 0.0254; B6 = B4 * 0.3048; H4 = (B6+B5)*((D3*0.0254)+(D4*0.3048))*((F3*0.0254)+(F4*0.3048)); H6 = F6 * 0.02831685; H7 = F7 * 0.7645549;  document.Calculator.B5.value = Math.round(B5 * 10000) /10000; document.Calculator.B6.value = Math.round(B6 * 10000) /10000; document.Calculator.H4.value = Math.round(H4 * 100) /100; document.Calculator.H6.value = Math.round(H6 * 100) /100; document.Calculator.H7.value = Math.round(H7 * 100) /100;   }function clear_imperial(){ document.Calculator.B3.value= ""; document.Calculator.D3.value= ""; document.Calculator.F3.value= "";  document.Calculator.B4.value= ""; document.Calculator.D4.value= ""; document.Calculator.F4.value= "";   document.Calculator.F6.value= "2";  document.Calculator.F7.value= "4";   document.Calculator.B5.value = ""; document.Calculator.B6.value = ""; document.Calculator.H4.value = ""; document.Calculator.H6.value = ""; document.Calculator.H7.value = "";   }function validate_quantity(){ if (document.Calculator.B11.value == '') {alert("Please enter length !"); document.Calculator.B11.focus();    return false; } if(isNaN(document.Calculator.B11.value)){alert("Please enter only a numeric value for length.");document.Calculator.B11.focus();return false;} if (document.Calculator.D11.value == '') {alert("Please enter width !"); document.Calculator.D11.focus();    return false; } if(isNaN(document.Calculator.D11.value)){alert("Please enter only a numeric value for width.");document.Calculator.D11.focus();return false;} if (document.Calculator.F11.value == '') {alert("Please enter depth !"); document.Calculator.F11.focus();    return false; } if(isNaN(document.Calculator.F11.value)){alert("Please enter only a numeric value for depth.");document.Calculator.F11.focus();return false;} var B11 = document.Calculator.B11.value * 1; var D11 = document.Calculator.D11.value * 1; var F11 = document.Calculator.F11.value * 1; var H11;  H11 = B11*D11*F11;  document.Calculator.H11.value = Math.round(H11 * 100) /100;   }function clear_quantity(){ document.Calculator.B11.value= ""; document.Calculator.D11.value= ""; document.Calculator.F11.value= "";  document.Calculator.H11.value = "";   }