How can I return a value from an AJAX request? [duplicate]

Answer 1

Instead a plain string variable, you can use an object.

function sendRuest(someargums) {

     var the_variable = {
         data: null,
         setData: function(data){ this.data = data;}
     }

     //here's that other function 
     request.onreadystatechange =   
        function() {                
            if (request.readyState == 4) {    
                switch (request.status) {
                    case 200:
                        //here the variable should be changed
                        the_variable.setData(request.responseXML);

        }

     return the_variable;
}

Anyway, your last line isn't going to work. When the function 'sendRuest' ends, the XHR request is not completed. You need to use timers to check the value of 'the_variable.data' (very bad) or use callbacks as stated in other answers.

Sergio.