source: trunk/workflow/js/jscode/get_form_fields.js @ 3684

/**
* Gets all fields that have the id starting with "_".
* It's usefull when you have to validate fields with an ajax call, for example.
* Returns an array of elements.
*/
function get_form_fields(form_id){
        var elems = document.forms[form_id].elements;
        var arr   = new Object();
        var j     = 0;
        for(var i = 0; i < elems.length; i++){
                if(elems[i].id.substr(0,1) == "_"){
                        // if the element is a radiobutton and is NOT checked, goes to the next element
                        if(elems[i].type == "radio" && !elems[i].checked){
                                continue;
                        }

                        if(elems[i].type == "select-multiple"){
                                var selectBoxMultiple = elems[i];
                                var selectArr = new Array();
                                for(k = 0; k < elems[i].length; k++){
                                        var option = selectBoxMultiple.options[k];
                                        if(option.selected){
                                                if(option.value != ''){
                                                        selectArr.push(option.value);
                                                } else {
                                                        selectArr.push(option.innerHTML);
                                                }
                                        }
                                }

                                arr[elems[i].id] = selectArr;
                                j++;
                                continue;
                        }

                        // if the element has [] in the end of its name, return its values (or checked elements) like an array
                        if(elems[i].name.substr(-2,2) == "[]"){
                                elem_name = elems[i].name.substr(0, elems[i].name.length - 2);
                                if(arr[elem_name] == undefined){
                                        arr[elem_name] = new Array();
                                }

                                if(elems[i].type != "checkbox")
                                        arr[elem_name].push(elems[i].value);
                                else if(elems[i].checked)
                                        arr[elem_name].push(elems[i].value);
                                j++;
                                continue;
                        }

                        arr[elems[i].id] = elems[i].value;
                        j++;
                }
        }
        return arr;
}