function validate(tt)
		{ 			 
			if(tt.name.value =="")
			{
				alert("Please enter your name!");
				tt.name.focus();
				return false;
			}
			if(tt.email.value =="")
			{
				alert("Please enter your email address!");
				tt.email.focus();
				return false;
			}
			if(!isValidEmail(tt.email.value))
			{
				tt.email.focus();
				return false;
			}			
			if(tt.subject.value =="")
			{
				alert("Please select a subject!");
				tt.subject.focus();
				return false;
			}
			if(tt.comments.value =="")
			{
				alert("Please enter your comments!");
				tt.comments.focus();
				return false;
			}
			if(tt.phone.value =="")
			{
				alert("Please enter your phone number!");
				tt.phone.focus();
				return false;
			}
			if(tt.location.value =="")
			{
				alert("Please enter your location!");
				tt.location.focus();
				return false;
			}
			if(tt.date.value =="")
			{
				alert("Please enter a date for your demo!");
				tt.date.focus();
				return false;
			}
			if(tt.time.value =="")
			{
				alert("Please enter a time for your demo!");
				tt.time.focus();
				return false;
			}
		}