var FieldHiLiteColor='LightCyan';
var tglFlag=0;
var tglLastField='';
function ToggleBkg(cell) {
   box=document.getElementById(cell);
 //Certain fields do not highlight (files, checkboxes and radio buttons)
   if (tglLastField != cell)
       tglFlag=0;
   if (tglFlag == 0) {
     tglFlag=1;
     box.style.backgroundColor=FieldHiLiteColor;
   } else {
     tglFlag=0;
     box.style.backgroundColor="#FFFFFE";
   }
   tglLastField=cell;
}