isDOM=document.getElementById;
	isMSIE=document.all && document.all.item; 
	isNetscape4=document.layers; 
	isOpera=window.opera; 
	isMozilla=isNetscape6=isDOM && !isMSIE && !isOpera;
	
	function esc_catch() {
		document.onkeypress=check_word;
	}
	function check_word(ev) {                  	  
		if(isMSIE) {																				 
					  if(event.keyCode==27) closePop();											 
					  }
		else   {																				 
					  if(ev.keyCode==27) closePop();												 
					  }
		}