function areaCon() {
   var a1 = document.conv2.area1.selectedIndex;
   var a2 = document.conv2.area2.selectedIndex;
   var a = document.conv2.areaval1.value;
   document.conv2.areaval2.value;

   if (a1 == 1 && a2 == 1) {document.conv2.areaval2.value = a;}
   if (a1 == 1 && a2 == 2) {document.conv2.areaval2.value = Math.round((((a) * 100)) * 100000) / 100000;}
   if (a1 == 1 && a2 == 3) {document.conv2.areaval2.value = Math.round((((a) * 1000000)) * 100000) / 100000;}  
   if (a1 == 1 && a2 == 4) {document.conv2.areaval2.value = Math.round((((a) * 0.3861)) * 100000) / 100000;}
   if (a1 == 1 && a2 == 5) {document.conv2.areaval2.value = Math.round((((a) * 1195991.991638)) * 100000) / 100000;}
   if (a1 == 1 && a2 == 6) {document.conv2.areaval2.value = Math.round((((a) * 10763926.637382)) * 100000) / 100000;}
   if (a1 == 1 && a2 == 7) {document.conv2.areaval2.value = Math.round((((a) * 247.108827)) * 100000) / 100000;}

   if (a1 == 2 && a2 == 1) {document.conv2.areaval2.value = Math.round((((a) * 0.01)) * 100000) / 100000;}
   if (a1 == 2 && a2 == 2) {document.conv2.areaval2.value = a;}
   if (a1 == 2 && a2 == 3) {document.conv2.areaval2.value = Math.round((((a) * 10000)) * 100000) / 100000;}  
   if (a1 == 2 && a2 == 4) {document.conv2.areaval2.value = Math.round((((a) * 0.003861)) * 10000) / 10000;}
   if (a1 == 2 && a2 == 5) {document.conv2.areaval2.value = Math.round((((a) * 11959.919916)) * 100000) / 100000;}
   if (a1 == 2 && a2 == 6) {document.conv2.areaval2.value = Math.round((((a) * 107639.266374)) * 100000) / 100000;}
   if (a1 == 2 && a2 == 7) {document.conv2.areaval2.value = Math.round((((a) * 2.471088)) * 100000) / 100000;}

   if (a1 == 3 && a2 == 1) {document.conv2.areaval2.value = Math.round((((a) * 0.000001)) * 100000) / 100000;}
   if (a1 == 3 && a2 == 2) {document.conv2.areaval2.value = Math.round((((a) * 0.0001)) * 100000) / 100000;}
   if (a1 == 3 && a2 == 3) {document.conv2.areaval2.value = a;}  
   if (a1 == 3 && a2 == 4) {document.conv2.areaval2.value = Math.round((((a) / 2590000)) * 100000) / 100000;}
   if (a1 == 3 && a2 == 5) {document.conv2.areaval2.value = Math.round((((a) * 1.195992)) * 100000) / 100000;}
   if (a1 == 3 && a2 == 6) {document.conv2.areaval2.value = Math.round((((a) * 10.763927)) * 100000) / 100000;}
   if (a1 == 3 && a2 == 7) {document.conv2.areaval2.value = Math.round((((a) * 0.000247)) * 100000) / 100000;}

   if (a1 == 4 && a2 == 1) {document.conv2.areaval2.value = Math.round((((a) * 2.59)) * 100000) / 100000;}
   if (a1 == 4 && a2 == 2) {document.conv2.areaval2.value = Math.round((((a) * 259)) * 100000) / 100000;}
   if (a1 == 4 && a2 == 3) {document.conv2.areaval2.value = Math.round((((a) * 2590000)) * 100000) / 100000;}  
   if (a1 == 4 && a2 == 4) {document.conv2.areaval2.value = a;}
   if (a1 == 4 && a2 == 5) {document.conv2.areaval2.value = Math.round((((a) * 3097619.258341)) * 100000) / 100000;}
   if (a1 == 4 && a2 == 6) {document.conv2.areaval2.value = Math.round((((a) * 27878569.990818)) * 100000) / 100000;}
   if (a1 == 4 && a2 == 7) {document.conv2.areaval2.value = Math.round((((a) * 640.011861)) * 100000) / 100000;}

   if (a1 == 5 && a2 == 1) {document.conv2.areaval2.value = Math.round((((a) * 0.000001)) * 100000) / 100000;}
   if (a1 == 5 && a2 == 2) {document.conv2.areaval2.value = Math.round((((a) * 0.000084)) * 100000) / 100000;}
   if (a1 == 5 && a2 == 3) {document.conv2.areaval2.value = Math.round((((a) * 0.836126)) * 100000) / 100000;}  
   if (a1 == 5 && a2 == 4) {document.conv2.areaval2.value = Math.round((((a) / 3097619.258341)) * 100000) / 100000;}
   if (a1 == 5 && a2 == 5) {document.conv2.areaval2.value = a;}
   if (a1 == 5 && a2 == 6) {document.conv2.areaval2.value = Math.round((((a) * 8.999)) * 100000) / 100000;}
   if (a1 == 5 && a2 == 7) {document.conv2.areaval2.value = Math.round((((a) * 0.000207)) * 100000) / 100000;}

   if (a1 == 6 && a2 == 1) {document.conv2.areaval2.value = Math.round((((a) / 10763926.637382)) * 100000) / 100000;}
   if (a1 == 6 && a2 == 2) {document.conv2.areaval2.value = Math.round((((a) * 0.000009)) * 10000000) / 10000000;}
   if (a1 == 6 && a2 == 3) {document.conv2.areaval2.value = Math.round((((a) * 0.092903)) * 100000) / 100000;}  
   if (a1 == 6 && a2 == 4) {document.conv2.areaval2.value = Math.round((((a) / 27878569.990818)) * 100000) / 100000;}
   if (a1 == 6 && a2 == 5) {document.conv2.areaval2.value = Math.round((((a) * 0.111111)) * 100000) / 100000;}
   if (a1 == 6 && a2 == 6) {document.conv2.areaval2.value = a;}
   if (a1 == 6 && a2 == 7) {document.conv2.areaval2.value = Math.round((((a) * 0.000023)) * 100000) / 100000;}

   if (a1 == 7 && a2 == 1) {document.conv2.areaval2.value = Math.round((((a) * 0.004047)) * 100000) / 100000;}
   if (a1 == 7 && a2 == 2) {document.conv2.areaval2.value = Math.round((((a) * 0.40468)) * 100000) / 100000;}
   if (a1 == 7 && a2 == 3) {document.conv2.areaval2.value = Math.round((((a) * 4046.8)) * 100000) / 100000;}  
   if (a1 == 7 && a2 == 4) {document.conv2.areaval2.value = Math.round((((a) * 0.001562)) * 100000) / 100000;}
   if (a1 == 7 && a2 == 5) {document.conv2.areaval2.value = Math.round((((a) * 4839.940392)) * 100000) / 100000;}
   if (a1 == 7 && a2 == 6) {document.conv2.areaval2.value = Math.round((((a) * 43559.458316)) * 100000) / 100000;}
   if (a1 == 7 && a2 == 7) {document.conv2.areaval2.value = a;}
}