function getStyle(objName,cAttribute){
 //if IE
 obj = document.getElementById(objName);
 if (obj.currentStyle){
   var curVal=eval('obj.currentStyle.'+cAttribute);
 }else{
  //if Mozilla/FF
   var curVal=eval('document.defaultView.getComputedStyle(obj, null).'+cAttribute);
 } 
 return curVal;
 }