/* 
	Usage : call function using a URL, window width, height and Name.. 
	Example : open_url('http://myurl.com',100,100,'MyPoPuP'); 
	*/ 
	var Winpop; 
	var msg; 
	function open_url(url,swidth,sheight,wname) { 
		LeftPosition=(screen.width)?(screen.width-swidth)/2:100; 
		TopPosition=(screen.height)?(screen.height-sheight)/2:100; 
//		var sb = (s == "true")? "1":"0"; 
//		alert(sb); 
		if ((!Winpop)||(Winpop.closed)) { 
			Winpop = window.open(url,wname,'scrollbars=0,menu=0,height='+sheight+',width='+swidth+',left='+LeftPosition+',top='+TopPosition);
		}else { 
			Winpop.location.href = url; 
			Winpop.focus(); 
		} 
	}