// open links in new window
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;

// validate form
function validate_required(field,alerttxt)
{
with (field)
  {
  if (value==null||value=="")
    {
    alert(alerttxt);return false;
    }
  else
    {
    return true;
    }
  }
}

function validate_form(thisform)
{
with (thisform)
  {
  if (validate_required(senderName,"Please enter your full name.")==false)
  	{
  	senderName.focus();return false;
  	} else if (validate_required(senderEmail,"Please enter a valid email address.")==false)
  	{
  	senderEmail.focus();return false;
  	} else if (validate_required(senderMessage,"Please enter a message.")==false)
  	{
  	senderMessage.focus(); return false;
  	}
  }
}