var windownum = 1;

function popupWin(src, w, h, x, y, winName) {

	++windownum; 

	if (!x) {
		
		if (document.all) {
			x = window.screenLeft + $("body").getWidth() / 2 - w / 2;
			y = window.screenTop;
		}
		else if (window.innerWidth) {
			x = window.screenX + $("body").getWidth() / 2 - w / 2;
			y = window.screenY + h /2;
		}
	}

	if(!winName)
		winName = windownum; 

	if(hndle = window.open(src, winName, 'scrollbars=yes,resizable=yes,status=yes,width=' + w + ',height=' + h + ',left=' + x + ',top=' + y)) {
		hndle.focus();
		return hndle;
	}
	else
		return false;
}