/* Open to new window
 * @param target url
 */
function popWindowCenter(url) {
	var w = 480, h = 340;
	
	if (document.all || document.layers) {
	   w = screen.availWidth;
	   h = screen.availHeight;
	}
	
	var popW = 757, popH = 700;
	
	var leftPos = (w-popW)/2, topPos = (h-popH)/2;
	
	window.open(url,'','width=' + popW + ',height=' + popH + ',top=' + topPos + ',left=' + leftPos);
}