/**
 * This funciton creates a popup window for the web site.
 * 
 * @param url - the url of the new popup webpage.
 * @param width - the width (in pixles) of the new popup window
 * @param height - the height (in pixles) of the new popup window
 * 
 * @return false
 */
function popup(url,width,height) {
  	
    // create a new window with the given url, height and width
    newWindow = window.open(url,'','menubar=0,titlebar=0,scrollbars=1,height=' + height + ',width=' + width);
  	
    // if the current window has focus, then set focus to the new window
    if (window.focus)
    {
        newWindow.focus();
    }
    
  	return false;
}