create textbox dynamically

I have created a dynamic tree menu and i have placed a checkbox in each to create a textbox while the checkbox of  a levelitem is checked(the textbox should be placed near the levelitem)?
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This could be done with javascript. (give a try)

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Assuming your tree is build of <li> tags

// define click handler
function LiChange (e)
    // identify who sent this event
    if (e && {
        // Mozilla browsers
        myTarget =;
    } else {
        // Internet Explorer
        myTarget = this;
        if (event) {
            e = event;
    // delete existing textareas below myTarget
    myTextareas = myTarget.getElementsByTagName('TEXTAREA');
    for (i = 0; i < myTextareas.length; i++) {
    if (myTarget.checked) {
        // create textarea
        myText = document.createElement('TEXTAREA');
        // set name to name of target and append some text = + '_text';

// attach onchange handler dynamically; so you do not need to set an onchange handler in your HTML code
myLis = document.getElementsByTagName('LI');
for (i = 0; i < myLis.length; i++) {
    myLi = myLis.item(i);
    myLi.onchange = LiChange;
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