//window pop function
function popUp(url, name, winWidth, winHeight)
{
	var w = winWidth, h = winHeight, cw = w/2, ch = h/2;
	
	if (window.screen) {
	    cw = Math.floor((screen.availWidth-w)/2);
	    ch = Math.floor((screen.availHeight-h)/2);
	}
	var win1 = window.open(url, name, "resizable=yes,scrollbars=auto,height="+h+",width="+w);
	
	win1.focus();
}