How to efficiently change image attribute “src” from relative URL to absolute using jQuery?

Question

I need to change the src for an html image tag from relative to absolute url.

I am using the following code. urlRelative and urlAbsolute are created correct

Answer 1

change image captcha refresh

html:

jquery:

$("#captcha_img").click(function()
    {
        var capt_rand=Math.floor((Math.random() * 9999) + 1);
        $("#captcha_img").attr("src","http://localhost/captcha.php?" + capt_rand);
    });