function form_submit(form_name){
		var ajax = new Ajax();
		
		//retrieve data from form
		var request_form = document.getElementById(form_name);
		var form_data = formData2QueryString(request_form);
		//alert(form_data);
		ajax.doPost('form_responder.php/' + form_name + '.html', form_data, form_travel_request_return);
	}
	
	function form_travel_request_return(str){
		//alert(str);
		
		var myObject = JSON.parse(str);
		
		if(myObject.error == 1){
			alert(myObject.message);
		}else{
			var message = '<p>' + myObject.message + '</p>';
			document.getElementById('main').innerHTML = message;
		}
	}