function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}
//window.onload = externalLinks;

sfHover = function() {
  var sfEls = document.getElementById("nav").getElementsByTagName("LI");
  for (var i=0; i<sfEls.length; i++) {
    sfEls[i].onmouseover=function() {
      this.className+=" sfhover";
	}
	sfEls[i].onmouseout=function() {
	  this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
	}
  }
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

function popup(url,size) {
  newwindow=window.open(url,'name',size);
  if (window.focus) {
    newwindow.focus()
  }
  return false;
}

//Run our clever scripts onload
function start() {
  externalLinks();
}
window.onload = start;

function checkform (form)
{
  if (form.email.value == "") {
    alert( "Please enter your email address." );
    form.email.focus();
    return false ;
  }
  if (form.Firstname.value == "") {
    alert( "Please enter your firstname." );
    return false ;
  }
  if (form.Surname.value == "") {
    alert( "Please enter your surname." );
    return false ;
  }
  if (form.Address.value == "") {
    alert( "Please enter your address." );
    return false ;
  }
  return true ;
}

function checkbrochureform(form)
{
  if (form.Initial.value == "") {
    alert( "Please enter your initial." );
    return false ;
  }
  if (form.Surname.value == "") {
    alert( "Please enter your surname." );
    return false ;
  }
  if (form.Address.value == "") {
    alert( "Please enter your address." );
    return false ;
  }
  return true ;
}