function showDiv(strDivName, bolVisible){
  var   isNS4 = (document.layers) ? true : false;
  var   isIE4 = (document.all && !document.getElementById) ? true : false;
  var   isIE5 = (document.all && document.getElementById) ? true : false;
  var   isNS6 = (!document.all && document.getElementById) ? true : false;
 if (isNS4) {
   objElement = document.layers[strDivName];
 } else if (isIE4) {
   objElement = document.all[strDivName].style;
 } else if (isIE5 || isNS6) {
   objElement = document.getElementById(strDivName).style;
 }
 if(isNS4){
     if(!bolVisible) {
       document.layers[strDivName].visibility ="hidden"
     } else {
       document.layers[strDivName].visibility ="visible"
     }     
 }else if(isIE4){
     if(!bolVisible) {
       document.all[strDivName].style.visibility = "hidden";
     } else {
       document.all[strDivName].style.visibility = "visible";
     }
}
 else if (isIE5 || isNS6) {
      if (document.getElementById(strDivName).style.display== "none")
	  {
	   document.getElementById(strDivName).style.display="block";
	  }
	   else {
        document.getElementById(strDivName).style.display = "none";
        }
      }
}