How can I pass a parameter to a setTimeout() callback?

Question

I have some JavaScript code that looks like:

function statechangedPostQuestion()
{
  //alert("statechangedPostQuestion");
  if (xmlhttp.readyState==         


        

Answer 1

As there is a problem with the third optonal parameter in IE and using closures prevents us from changing the variables (in a loop for example) and still achieving the desired result, I suggest the following solution.

We can try using recursion like this:

var i = 0;
var hellos = ["Hello World1!", "Hello World2!", "Hello World3!", "Hello World4!", "Hello World5!"];

if(hellos.length > 0) timeout();

function timeout() {                
    document.write('
' + hellos[i] + '
');
    i++;
    if (i < hellos.length)
        setTimeout(timeout, 500);
}

We need to make sure that nothing else changes these variables and that we write a proper recursion condition to avoid infinite recursion.