$.fn.extend({
    post_form: function(action, method, fn) {					 

   	var element = $(this);
    
    if (action=="")
    action=$(this).attr("action");
    
    if (method=="")
	method=action=$(this).attr("method");
	
	if (method=="")
	method="post";
	
    var data = $(this).serialize();
    
			if (method=="POST" || method=="post"){
						$.post(action, data, function(data) { 
						fn(data);
						});
			}
    
			if (method=="GET" || method=="get"){
						$.get(action, data, function(data) { 
						fn(data);
						});
			}
    
    
    			
    }
});