function DisableSubmit() {

    var theMessage = ""
    var noErrors = theMessage

	// make sure field is not blank
	if (document.eusas.firstname.value=="") {
	theMessage = theMessage + "\n --> Please enter your first name";
	}

	if (document.eusas.surname.value=="") {
	theMessage = theMessage + "\n --> Please enter your surname";
	}

	if (document.eusas.phone.value=="") {
	theMessage = theMessage + "\n --> Please enter your phone";
	}

	// validate an e-mail address
	if (!/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(document.eusas.email.value)){
	theMessage = theMessage + "\n --> Please enter a valid e-mail address";
	}

	if (document.eusas.message.value=="Please enter your enquiry details..." || document.eusas.message.value=="")  {
	theMessage = theMessage + "\n --> Please detail your interest";
	}

    // If no errors, submit the form
    if (theMessage == noErrors) {

	document.eusas.b_submit.disabled = true;
	document.eusas.b_clear.disabled = true;
	document.eusas.submit();

    } else {

    // If errors were found, show alert message
    alert(theMessage);
    return false;
    }

}


function clearText(thefield)
				{
					if (thefield.defaultValue == thefield.value)
									thefield.value = ""
     				//else thefield.value = thefield.defaultValue
				}