function checkForm() {

var emailName;
var emailTel;
var emailEmail;
var emailMessage;
var permittedChars;

emailName = document.getElementById("emailName").value;
emailTel = document.getElementById("emailTel").value;
emailEmail = document.getElementById("emailEmail").value;
permittedChars = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
emailMessage = document.getElementById("emailMessage").value;


if (emailName == "") {
	hideAllErrors();
	document.getElementById("emailNameError").style.display = "inline";
	document.getElementById("emailName").select();
	document.getElementById("emailName").focus();
return false;

} else if (emailTel == "") {
	hideAllErrors();
	document.getElementById("emailTelError").style.display = "inline";
	document.getElementById("emailTel").select();
	document.getElementById("emailTel").focus();
return false;

} else if (permittedChars.test(emailEmail) == false) {
	hideAllErrors();
	document.getElementById("emailEmailError").style.display = "inline";
	document.getElementById("emailEmail").select();
	document.getElementById("emailEmail").focus();
return false;

} else if (emailMessage == "") {
	hideAllErrors();
	document.getElementById("emailMessageError").style.display = "inline";
	document.getElementById("emailMessage").select();
	document.getElementById("emailMessage").focus();
return false;

}
return true;
}
 
function hideAllErrors() {
	document.getElementById("emailNameError").style.display = "none"
	document.getElementById("emailTelError").style.display = "none"
	document.getElementById("emailEmailError").style.display = "none"
	document.getElementById("emailMessageError").style.display = "none"
}