// popup 
var tempImage;
var win = null; 
function openWin(img, width, height, prepath){
	if (win != null){
		win = tempWin.close();
	}
	tempImage = img;
	tempWin = window.open(prepath +'popup.htm','','width=' + width + ',height=' + height + ',status=no');
	win = tempWin.document;
}
function popup(width,height,location)
{
    x = (640 - width)/2, y = (480 - height)/2;
    if (screen) {
        y = (screen.availHeight - height)/2;
        x = (screen.availWidth - width)/2;
    }
	popup4 = window.open(location,"newWindow","toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=no,copyhistory=no,width="+width+",height="+height+",screenX="+x+",screenY="+y+",top="+y+",left="+x+",scrollbars=yes");
    setTimeout('popup4.focus();',250);
}