Adding element <a> before every <img>

Question

I have this HTML code created by a javascript file, which is not understandable because it was created using GWT(Google Web Toolkit).

<img style="z-index: 6; width: 116px; position: absolute; left: 84px; top: 174px;" src="spiral/sample9.jpg">  
<img style="z-index: 12; width: 197px; position: absolute; left: 0px; top: 161px;" src="spiral/sample1.jpg">
<img style="z-index: 1; position: absolute; left: 659px; top: 213px; width: 85px; opacity: 0.04; display: none;" src="spiral/sample17.jpg">  
<img style="z-index: 1; position: absolute; left: 644px; top: 208px; width: 85px; opacity: 0.08; display: none;" src="spiral/sample18.jpg">

Now I need to add the tag <a> before every image, using as src , part of the src of the image. For example: " href="../tmp.php?title=sample9.mp4 "

Any clue how can I do this?

The output I want to create is something like this:

<a href="../tmp.php?title=sample9.mp4"><img style="z-index: 6; width: 116px; position: absolute; left: 84px; top: 174px;" src="spiral/sample9.jpg"></a>

Answer 1

With jQuery, you can use wrap() to do this:

$('img').each(function() {
    $(this).wrap($('<a/>', {href: this.src}));
});

Answer 2

What you want is to wrap and to build the right href you can use a regular expression :

$('img').wrap(function(){
    return $('<a>').attr(
        'href',
        '../tmp.php?title=' + this.src.match(/\/(.*?)\.jpg$/)[1] + '.mp4'
    )
});

Answer 3

Quite apart from your obvious lack of understanding of the querySelector function, you also expect </img> to work (it doesn't, it's a void element)...

Here's how you should go about it, with comments to explain:

var imgs, l, i, img, par, a; // prepare some variables
imgs = document.getElementByTagName('img');
                             // get all images on the page
l = imgs.length;             // save the number of images (for performance reasons)
for( i=0; i<l; i++) {        // loop through all images
    img = imgs[i];           // for easire access
    par = img.parentNode;    // get the parent of the current image
    a = document.createElement('a');
                             // create a new link
    a.href = "../tmp.php?title="+img.src.match(/([^\/.]+\.\w+$/)[1]+".mp4";
                             // extract the right part from the image source
                             // and put it into the link's href
    par.insertBefore(a,img); // insert the link before the image
    a.appendChild(img);      // move the image so that it is inside the link
}