function CheckMultiple31(frm, name) {
	for (var i=0; i < frm.length; i++)
	{
		fldObj = frm.elements[i];
		fldId = fldObj.id;
		if (fldId) {
			var fieldnamecheck=fldObj.id.indexOf(name);
			if (fieldnamecheck != -1) {
				if (fldObj.checked) {
					return true;
				}
			}
		}
	}
	return false;
}

function CheckForm31(f) {
	if (f.email.value == "") {
		alert("Please enter your email address.");
		f.email.focus();
		return false;
	}

	var fname = "CustomFields_1_31";
	var fld = document.getElementById(fname);
	if (fld.value == "") {
		alert("Please enter a value for field First Name");
		fld.focus();
		return false;
	}

	var fname = "CustomFields_2_31";
	var fld = document.getElementById(fname);
	if (fld.value == "") {
		alert("Please enter a value for field Surname");
		fld.focus();
		return false;
	}

	var fname = "CustomFields_4_31";
	var fld = document.getElementById(fname);
	if (fld.value == "") {
		alert("Please enter a value for field Mobile Phone");
		fld.focus();
		return false;
	}

		return true;
	};