function validateLoginData()
{
	var i=0;
	var message=new Array();
	var elem=null;

	if($('#username').val().replace(/\s/g,'')=="")
	{
		message[i++]="Username cannot be blank.";
		elem=(elem==null)?$('#username'):elem;
	}
	else if($('#password').val()=="")
	{
		message[i++]="Password cannot be blank.";
		elem=(elem==null)?$('#username'):elem;
	}
	if(i>0)
	{
		$('#message').html(message.join('<br>'));
		elem.focus();
		return false;
	}
	return true;
}