window.onbeforeunload=function (){  
              var n = window.event.screenX - window.screenLeft; 
              var b = n > document.documentElement.scrollWidth-20; 
              if(b && window.event.clientY < 0 || window.event.altKey) 
              { 
              	 var winWidth = 640;
              	 var winHeight = 400;
              	 var leftPos=(screen.width-winWidth)/2;
								 var topPos=(screen.height-winHeight)/2;
								 var params = 'height='+winHeight+', width='+winWidth+', top='+topPos+', left='+leftPos+', toolbar=no, menubar=no, scrollbars=no, resizable=no,location=no, status=no';
								 
								 //params ='fullscreen=1,toolbar=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0';
								 window.open("/abandon.php","abandon",params);
              }else{
              	     //alert("refresh");
              	     
              }
	 }