storing ajax response in global variable

[php_developer]

I want to store the "xmlhttp.responseText" into a global variable so that the response i am getting can be used in another function. xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { validvar=xmlhttp.responseText; alert(validvar); a=validvar; } Actually I want to show the response in a confirm box and if the user click ok only then go to next page or submit the form else in case of cancel the form shuld not be submitted. here a is the global variable. I am storing the xmlhttp.responseText into validvar and then in global variable a. But The global variable remains empty when I access it another function. OR if there is any other way to store the response so that i can use it in another function and in the confirm box..

[JamesB]

xmlhttp.onreadystatechange=function(){if (xmlhttp.readyState==4 && xmlhttp.status==200){window.globalVariableName = xmlhttp.responseText;}}; function someOtherFunction() {confirm(window.globalVariableName);}

[justsomeguy]

Instead of using a global variable just pass it as a parameter to the next function.