function checkField(){
	var regName = document.myform.rname.value;
	var contact = document.myform.telephone.value;
	var email = document.myform.email.value;	
	var addr = document.myform.address.value;
	var qualif = document.myform.quali.value;
	var sal = document.myform.salutation;
	var gen = document.myform.gender;

	var validName=/^[A-Z]+$/i;
	var validNo=/^[0-9]+$/;
	var validMail=/^([0-9]|[a-z]|_)+@([0-9]|[a-z]|_|-)+((\.([a-z]{2,3}))$|((\.([a-z]{2,3}))(\.([a-z]{2}))))$/i;

	if(regName.search(validName)==-1)
		{alert("Invalid name.");
		return false;
		}

	if(contact.search(validNo)==-1)
		{alert("Invalid contact.");
		return false;
		}

	if(email.search(validMail)==-1)
		{alert("Invalid email.");
		return false;
		}
	
	if(email.search(validAddr)==-1)
		{alert("Invalid address.");
		return false;
		}
	
	if(!(gen[0].checked || gen[1].checked))
		{alert("Please confirm your gender.");
		return false;
		}

	if(!(sal[0].checked || sal[1].checked || sal[2].checked))
		{alert("Please confirm your salutation.");	
		return false;
		}
	
	return true;
	
}