Javascript serialize form
When you can not use javascript libraries like jQuery, MooTools, Dojo, YUI or Prototype, and their built-in functions, but still want a quick and easy way to serialize forms, you need a function like that one. This is the reason to write this function. Get the code or view demo.
function serialize (form) {
if (!form || form.nodeName !== "FORM") {
return;
}
var i, j, q = [];
for (i = form.elements.length - 1; i >= 0; i = i - 1) {
if (form.elements[i].name === "") {
continue;
}
switch (form.elements[i].nodeName) {
case 'INPUT':
switch (form.elements[i].type) {
case 'text':
case 'hidden':
case 'password':
case 'button':
case 'reset':
case 'submit':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
case 'checkbox':
case 'radio':
if (form.elements[i].checked) {
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
}
break;
case 'file':
break;
}
break;
case 'TEXTAREA':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
case 'SELECT':
switch (form.elements[i].type) {
case 'select-one':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
case 'select-multiple':
for (j = form.elements[i].options.length - 1; j >= 0; j = j - 1) {
if (form.elements[i].options[j].selected) {
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].options[j].value));
}
}
break;
}
break;
case 'BUTTON':
switch (form.elements[i].type) {
case 'reset':
case 'submit':
case 'button':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
}
break;
}
}
return q.join("&");
}
if (!form || form.nodeName !== "FORM") {
return;
}
var i, j, q = [];
for (i = form.elements.length - 1; i >= 0; i = i - 1) {
if (form.elements[i].name === "") {
continue;
}
switch (form.elements[i].nodeName) {
case 'INPUT':
switch (form.elements[i].type) {
case 'text':
case 'hidden':
case 'password':
case 'button':
case 'reset':
case 'submit':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
case 'checkbox':
case 'radio':
if (form.elements[i].checked) {
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
}
break;
case 'file':
break;
}
break;
case 'TEXTAREA':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
case 'SELECT':
switch (form.elements[i].type) {
case 'select-one':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
case 'select-multiple':
for (j = form.elements[i].options.length - 1; j >= 0; j = j - 1) {
if (form.elements[i].options[j].selected) {
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].options[j].value));
}
}
break;
}
break;
case 'BUTTON':
switch (form.elements[i].type) {
case 'reset':
case 'submit':
case 'button':
q.push(form.elements[i].name + "=" + encodeURIComponent(form.elements[i].value));
break;
}
break;
}
}
return q.join("&");
}
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