// JavaScript Document
function mypopup(url,w,h,win_name){ 
	var w = w ? w : 600;
	var h = h ? h : 600;	
	var win_name = win_name ? win_name : "win";
	var t = screen.availHeight/2 - h/2;
	var l = screen.availWidth/2 - w/2;	
	window.open(url,win_name,'width='+w+',height='+h+',top='+t+',left='+l+',toolbars=no');	
}