// JavaScript Document

function popup (tpage, twidth,theight) {
	var props;
	var windowname = 'popup';
	var LeftPosition 	= (screen.width) ? (screen.width-twidth)/2 : 0;
	var TopPosition 	= (screen.height) ? (screen.height-theight)/2 : 0;
	var settings 		= 'top=' + TopPosition + ',left=' + LeftPosition + ',screenY=' + TopPosition + ',screenX=' + LeftPosition + ',height=' + theight + ',width=' + twidth + ', scrollbars=yes, ' + props;
	window.open(tpage, windowname, settings);
}