function webLink(url) {
  var wlWindowHandle="";
  if (url.indexOf("://")==-1)
    url="http://"+url;
  if (!wlWindowHandle.closed && wlWindowHandle.location)
    wlWindowHandle.location.href=url;
  else
    wlWindowHandle=window.open(url,wlWindowName);
  wlWindowHandle.focus();
}
function change(name,image,newstatus) {
  document[name].src=eval(image+".src");
  self.status=newstatus;
}
function viewportWidth() {
  var vpWidth;
  if (typeof window.innerWidth != 'undefined')
    vpWidth = window.innerWidth;
  else
    if (typeof document.documentElement != 'undefined' &&
        typeof document.documentElement.clientWidth != 'undefined' &&
        document.documentElement.clientWidth != 0)
      vpWidth = document.documentElement.clientWidth;
    else
     vpWidth = document.getElementsByTagName('body')[0].clientWidth;
  return vpWidth;
}