//Validate trainee application details

function check_cb(f)
{
	submitOK="true";
	var errors = "";
	var name = document.getElementById("callback_name").value;
	var phone = document.getElementById("callback_phone").value;
	var email = document.getElementById("callback_email").value;
			
	if(name.length == 0)
	{
		errors = errors + "You have not entered a name. \n";
		submitOK = "false";
	}
	if(phone.length == 0)
	{
		errors = errors +  "You have not entered a phone number. \n";
		submitOK = "false";
	}
	if(email.length == 0)
	{
		errors = errors +  "You have not entered an email. \n";
		submitOK = "false";
	}		
	if (submitOK=="false")
 	{
 		alert('There were errors in your submission : \n\n' + errors);
 		return false;
 	}
 	
}