var bV=parseInt(navigator.appVersion);
var isNS=(document.layers) ? true : false;
var isIE=((document.all)&&(bV >= 4))?true:false;

function show(obj){
    if(obj == null)
        return null;

        var status = obj.style.display;
        expand(obj);
}
function expand(element) 
{
/* if(isIE || isNS ){ 
 	element.style.display = "block";
 	alert("1")
 }
 
 else if( isNS ) {
       element.visibility = "show";
        	alert("2")
 }
*/
  	element.style.display = "block";
}

function hide(element) 
{
/*  if(isIE || isNS ) {
        element.style.display = "none";
  }     
  else if( isNS ) {
     element.visibility == "hide" 
 }
 */
     element.style.display = "none";
}