var url = window.location; 
						
			if(url == 'http://www.neuro-linguistics.net/contact.htm?mail=sent')
			{
				setInterval("document.getElementById('thanks').className = 'unhidden'",500); 
			}

function val() 
			{
			 
			var myemail = document.contact.email.value 
			var mysubject = document.contact.subject.value 
			var mymessage = document.contact.message.value 
															
			if (myemail != "") 
				{
					apos = myemail.indexOf("@")
					dotpos = myemail.lastIndexOf(".")
				
					if (apos < 1 || dotpos - apos < 2) 
					{
					alert("Please check your email address.")
					document.contact.email.focus()
					return false
					}
				}	
					
			if (myemail == "")
				{
					alert("Please fill in your email address?")
					document.contact.email.focus()
					return false
				}		
													
			if (mysubject == "")
				{
					alert("Please enter a subject.")
					document.contact.subject.focus()
					return false
				}	
				
			if (mymessage == "")
				{
					alert("Please write your message.")
					document.contact.message.focus()
					return false
				}		
			
			}