/*  validate from */
function validate(form) {
	allowSubmit = false;

	if (form.ID) {
		if (form.ID.length) {	
			for (var i = 0; i < form.ID.length; i++) {
				if (form.ID[i].checked) {
					allowSubmit = true;				
				}
			}
		}
		else {
			if (form.ID.checked) {
				allowSubmit = true;
			}
		}
	}
	
	if(allowSubmit) {
		form.submit();
	} else {
		alert ('Please select a session.');
	}	
}