function doPopup(href, windowname, w, h, s) {
var winl = (screen.width-w)/2;
var wint = (screen.height-h)/2;
windowprops = 'toolbars=0, location=0, directories=0, status=0, menubars=0, width='+w+', height='+h+', top='+wint+', left='+winl+', resizable='+s+', scrollbars=0';
NewWindow=window.open(href, windowname, windowprops);
}