Disallowed Key Characters

[eluser]CroNiX[/eluser]
Hard to decipher everything you have there as some of it seems overly complex, and without seeing the form side of things, but try this:

Code:

function jsUpdateCart() {
    var params = {}; //create new object
    params['csrf_clftoken'] = document.getElementsByName("csrf_clftoken")[0].value; //add the csrf key:value

    //cycle through and add all other key:value pairs
    var allNodes = document.getElementsByClassName("process");
    for(i = 0; i < allNodes.length; i++) {
       var temp = allNodes[i].id.split('_');
       params[temp[2]] = allNodes[i].value;
    }

    var ajax = new Ajax.Updater(
'ajax_msg','http://localhost/mysite/index.php/welcome/ajax_cart', {method:'post',parameters:params,onComplete:showMessage}
    );
}