var newwindow;

function popWin(url, name, width, height, scroll) {	var x = parseInt(screen.availWidth - width - 30); var y = 10; var outStr = 'height=' + height + ',width=' + width + ',top=' + y + ',left= ' + x + ',scrollbars=' + scroll;  
	if (!newwindow || newwindow.closed) { newwindow = window.open(url,name,outStr); newwindow.focus();} 
	else { newwindow.close('display_win');	newwindow = window.open(url,name,outStr); newwindow.focus(); }
	}