function OpenPopUp(whichPage, winWidth, winHeight) {
	winLeft = (screen.width) ? (screen.width-winWidth)/2 : 0;
	winTop = (screen.height) ? (screen.height-winHeight)/2 : 0;
	win = eval("window.open (\"" + whichPage + "\", \"_blank\", \"height=" + winHeight + ",width=" + winWidth + ",top=" + winTop + ",left=" + winLeft + ",resizable,scrollbars\")");
}