function ajax_request(num){
	dataString = "num="+num;
	$.ajax({  
     type: "POST",  
     url: "form_valid/check_sess_num.php",  
     data: dataString,  
     success: function(response) {  
	    if(response == true){
        	document.getElementById('contact_form').submit();
        }
        else{
        	alert("Verification number is wrong. Please try again." + response);
        }
     }  
    });
}


function callback() {
	//ajax_request(document.getElementById('code').value);
	//return false;
}