if (document.images) {

  img01 = new Image();
  img01b = new Image();
  img01.src = "images/nav_01.gif";
  img01b.src = "images/navactive_01.gif";

  img02 = new Image();
  img02b = new Image();
  img02.src = "images/nav_02.gif";
  img02b.src = "images/navactive_02.gif";
  
  img03 = new Image();
  img03b = new Image();
  img03.src = "images/nav_03.gif";
  img03b.src = "images/navactive_03.gif";  
  
  img04 = new Image();
  img04b = new Image();
  img04.src = "images/nav_04.gif";
  img04b.src = "images/navactive_04.gif";   
  
  img05 = new Image();
  img05b = new Image();
  img05.src = "images/nav_05.gif";
  img05b.src = "images/navactive_05.gif";   
  
  img06 = new Image();
  img06b = new Image();
  img06.src = "images/nav_06.gif";
  img06b.src = "images/navactive_06.gif";

  img07 = new Image();
  img07b = new Image();
  img07.src = "images/nav_07.gif";
  img07b.src = "images/navactive_07.gif";
  
  img08 = new Image();
  img08b = new Image();
  img08.src = "images/nav_08.gif";
  img08b.src = "images/navactive_08.gif";
  
}
function on(name) {
	if (document.images) {
		fullname = eval(name + "b");
		document[name].src = fullname.src;
	}
}
function off(name) {
  if (document.images) {
    fullname = eval(name);
	if (fullname.complete) {
      document[name].src = fullname.src;
	}
  }
}

document.onmousedown=right;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
	window.onmousedown=right;

function right(e) 
{
	if (navigator.appName == 'Netscape' &&
		(e.which == 3 || e.which == 2))
		return false;
	else if (navigator.appName == 'Microsoft Internet Explorer' &&
		(event.button == 2 || event.button == 3)) {
		alert("© GW Refrigeration 2003-2006 : Please don't copy our site content.");
		return false;
	} return true;
}

//THIS SCRIPT ENSURES THAT THE CLIENT FILLS IN ALL THE NECESSARY DETAILS
function validateEmail()
{
   if(document.getElementById("TITLE").value == "")
   {
      alert("Please select a title.");
   }
   else
   {
      if(document.getElementById("FULLNAME").value == "")
      {
         alert("Please enter your full name.");
      }
      else
      {
		  if(document.getElementById("DETAILS").value == "")
		  {
			 alert("Please enter your enquiry details.");
		  }
		  else
		  {
			 checkEmailAddress();
		  }
      }
   }
}

function checkEmailAddress()
{
emailString = document.getElementById("EMAIL").value;
atPos = emailString.indexOf("@")
dotPos = emailString.lastIndexOf(".")

	if(atPos == -1 || dotPos == -1)
	{
	   alert("Please check the email address you have entered appears to be invalid.");
	}
	else
	{
	   if(atPos > dotPos)
	   {
	   alert("Please check the email address you have entered appears to be invalid.");
	   }
	   else
	   {
	      if(dotPos - atPos == 1)
	      {
	      alert("Please check the email address you have entered appears to be invalid.");
	      }
	      else
	      {
	            document.ORDER.action = "email.php";
				document.ORDER.submit();
	      }
	   }
	}

}