function popUp (url, width, height) {
	var id = new Date().getTime();

	var left = window.screen.width/2 - width/2;
	var scrollbars = 0;
	if (height > (window.screen.height - 120)) {
		height = window.screen.height - 120;
		width = width + 30;
		scrollbars = 1;
	}
	window.open (url, id, 'toolbar=0, scrollbars='+scrollbars+', location=0, statusbar=0, menubar=o, resizable=1, top=0, left='+left+', width='+width+', height='+height);
}