function checkForm(){
	var alertStr = "";
	var formOk = true;

	var yourName = document.getElementById("checkName");
	var yourOrg = document.getElementById("checkOrg");
	var yourEnq = document.getElementById("checkEnq"); 
	var yourMail = document.getElementById("checkMail");
	var yourTel = document.getElementById("checkTel");

	if(yourTel.value==""){
		alertStr += "Please provide a telephone number so that we may contact you\n";
		formOk = false;
	}
	if(yourMail.value==""){
		alertStr += "Please provide an email address so that we may contact you\n";
		formOk = false;
	}
	if(yourName.value==""){
		alertStr += "Please provide your name\n";
		formOk = false;
	}
	if(yourOrg.value==""){
		alertStr += "Please provide the organisation you work for\n";
		formOk = false;
	}
	if(yourEnq.value==""){
		alertStr += "Please tell us what your enquiry is about\n";
		formOk = false;
	}
	if(alertStr!=""){
		alert(alertStr);
	}
	return formOk;
}