function checkThis(form1){
	if(form1.type.value=="")
	{
		alert("Please enter your type of machine.");
		form1.type.focus();
		return false;
	}
	if(form1.contactname.value=="")
	{
		alert("Please enter your name.");
		form1.contactname.focus();
		return false;
	}
	var email;
	if (form1.contactemail.value != "")
	{
		//alert(document.frmContactEmail.txtEmail.value)
		Email = form1.contactemail.value
		if (!EmailCheck(Email))
		{
			return false;
		}
	}
	else
	{
		alert("Please enter your e-mail address.")
		form1.contactemail.focus()
		form1.contactemail.select()
		return false;
	}
	
	
	
	function EmailCheck (Email)
	{
	var EmailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	var matchArray=Email.match(EmailPat)

	if (matchArray==null)
	{
		alert("Email address seems incorrect (check @ and .'s)")
		form1.contactemail.focus()
		form1.contactemail.select()
		return false
	}

	var user=matchArray[1]
	var domain=matchArray[2]

	if (user.match(userPat)==null)
	{
		alert("The username doesn't seem to be valid.")
		form1.contactemail.focus()

		return false
	}
	var IPArray=domain.match(ipDomainPat)

	if (IPArray!=null)
	{
		  for (var i=1;i<=4;i++)
		  {
			if (IPArray[i]>255)
			{
				alert("Destination IP address is invalid.")
				form1.contactemail.focus()
				return false
			}
		}
		return true
	}

	var domainArray=domain.match(domainPat)

	if (domainArray==null)
	{
		alert("The domain name doesn't seem to be valid.")
		form1.contactemail.focus()

		return false
	}

	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length

	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3)
	{
	    alert("The address must end in a three-letter domain, or two letter country.")
		form1.contactemail.focus()

	    return false
	}

	if (len<2)
	{
	   var errStr="This address is missing a hostname."
	   alert(errStr)
	   form1.contactemail.focus()

	   return false
	}

	return true;

	} //end of function
	}