$(document).ready(function(){

	// tab mouse down 
	function tab_mousedown(index)
	{
		$('.menu li').each(function(){
			$(this).removeClass('tab_active');		
		});
		$('.menu #tab'+index).addClass('tab_active');
	}	
	tab_mousedown(6);

	//  submit contact us form event
	$('#contact_form').submit(function(){
		if ($('.txt_name').val() == "") {
            alert('Please enter full name');
            $('.txt_name').focus();
            return false;
        }
        if ($('.txt_mail').val() == "") {
            alert('Please enter email');
            $('.txt_mail').focus();
            return false;
        }
       if ($('.txt_msg').val() == "") {
            alert('Please enter message');
            $('.txt_msg').focus();
            return false;
        }
        return true;	
	});	
});