function CheckData() {
	var problem = 'No';
	if (document.contact.name.value.length <= 3) {
		alert ("Please enter your full name.");
		document.contact.name.focus();
		problem = 'Yes';	
	}
	if (document.contact.email.value.length <= 3) {
		alert ("Please enter a valid email address.");
		document.contact.email.focus();
		problem = 'Yes';	
	}
	if (document.contact.telephone.value.length <= 7) {
		alert ("Please enter a valid telephone number.");
		document.contact.telephone.focus();
		problem = 'Yes';	
	}
	if (document.contact.message.value.length <= 5) {
		alert ("Please enter a message.");
		document.contact.message.focus();
		problem = 'Yes';	
	}
	if (problem == 'No') {
		return true;
	} else { 
		return false; 
	}
}