function validateForm()
	{
		var emailAddress = document.contact_us.email.value;
		var at="@"
		var dot="."
		
		//remove spaces from telephone number
		var telString = "";
		var validateTel = document.contact_us.tel.value;
		validateTel = '' + validateTel;
		splitstring = validateTel.split(" ");
		for(i = 0; i < splitstring.length; i++)
		{
			telString += splitstring[i];
		}
	
		if(document.contact_us.name.value=="")
			{
				alert("Please enter your full name")
				document.contact_us.name.focus();
			}
		
		else if(document.contact_us.tel.value=="")
			{
				alert("Please enter your Telephone Number")
				document.contact_us.tel.focus();
			}
		else if (isNaN(telString))
			{				
				alert("Please enter a valid Telephone Number")
				document.contact_us.tel.focus();
			}
			
		else if(document.contact_us.email.value=="")
			{
				alert("Please enter your email address")
				document.contact_us.email.focus();
			}		
			
		else if (emailAddress.indexOf(at)==-1)
			{
				alert("Please enter a valid email address")
				document.contact_us.email.focus();
			}
		
		else if (emailAddress.indexOf(dot)==-1)
			{
				alert("Please enter a valid email address")
				document.contact_us.email.focus();
			}
			
		else if(document.contact_us.comments.value=="")
			{
				alert("Please enter your comment")
				document.contact_us.comments.focus();
			}
				
		else
			{
				document.contact_us.submit();
			}
	}