Dynamically change the HTML <img> src attribute using Java Script or JQuery

I need to change the html img src value dynamically from the value from hidden text field using Jquery or Java script.

<p><开发者_运维知识库;img id="yui_img" height="333" width="345"></p>

function onImgChange()
 {
document.getElementById('yui_img').src=document.getElementById('addProductLinksCreateForm:addProductLinkUrlValue').value;

 }

I got the value in the DOM but it is not getting reflected in it. Old image is maintained.

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This should work, but you need to ensure that these are the case:

• Does the textbox tag look like <input type="text" id="addProductLinksCreateForm:addProductLinkUrlValue">?

• Are you calling onImgChange() at all? You could try document.getElementById('addProductLinksCreateForm:addProductLinkUrlValue').onchange = onImgChange; to allow that to happen when the user switches to a different text box.

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Using jQuery, it would look like:

function onImgChange() {
     $('#yui_img').attr('src', function(i, src) {
         return $('#addProductLinksCreateForm').attr('src');
     });
}