function PopupCenter(url, title, w, h) {
			// Fixes dual-screen position                         Most browsers      Firefox
			var dualScreenLeft = window.screenLeft != undefined ? window.screenLeft : window.screenX;
			var dualScreenTop = window.screenTop != undefined ? window.screenTop : window.screenY;

			var width = window.innerWidth ? window.innerWidth : document.documentElement.clientWidth ? document.documentElement.clientWidth : screen.width;
			var height = window.innerHeight ? window.innerHeight : document.documentElement.clientHeight ? document.documentElement.clientHeight : screen.height;

			var left = ((width / 2) - (w / 2)) + dualScreenLeft;
			var top = ((height / 2) - (h / 2)) + dualScreenTop;
			var newWindow = window.open(url, title, 'scrollbars=yes, width=' + w + ', height=' + h + ', top=' + top + ', left=' + left);

			// Puts focus on the newWindow
			if (window.focus) {
				newWindow.focus();
}