html - Javascript get image source and inject into another image source

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html - Javascript get image source and inject into another image source

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

I've been working on a Javascript photo gallery and I want it to be very user-friendly. This involves only having to use one image and one link per image. I have it so all the images appear in a scrolling div on the left and onClick it is suppose to change the image source on the right but I can't seem to get javascript to get the image source from the original image and change the second one with it. I've tried a few other ways but this is the way I like and if I could get it to work it would be perfect.

This is inside a table so it is align differently I'm just giving the code needed.

This code was given below but it seems as though he deleted his answer. I think you were much close than me!

Javascript:

<script type="Text/javscript">

function setImage(this) {
    document.getElementById("ImageFrame").src = this.childNodes[0].src;
}

</script>

break

    <div style="width:275;height:400;overflow-x:scroll;">

     <a href="#" onclick="setImage(this);"><img class="gallery" src="JCF/PICT0421.jpg" /></a>

     <a href="#" onclick="setImage(this);"><img class="gallery" src="JCF/PICT0422.jpg" /></a>

     <a href="#" onclick="setImage(this);"><img class="gallery" src="JCF/PICT0423.jpg" /></a>

</div>

The image being changed.

    <div>
<img id="ImageFrame" src="JCF/PICT0421.jpg" width="400" />
</div>

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1 Answer

深蓝 · Answer 1 · 2022-01-31T07:05:56+0000

here is a working example. NOTE: a.getElementsByTagName('img')[0].src as different browsers would add nodes to tag before and after the child tag. It is safe to use getElementsByTagName('img')[0].src

<html>
    <head>
    <script type="text/javascript">
    function setImg(a){
          //alert(a.getElementsByTagName('img')[0].src);
              document.getElementById('ImageFrame').src = 
                          a.getElementsByTagName('img')[0].src
            }
        </script>
    </head>
    <body>
    <a href="#" onclick="setImg(this);"><img src="JCF/PICT0421.jpg"></a>

        <div>
           <img id="ImageFrame" src="JCF/PICT0421.jpg" width="400" />
        </div>
    </body>
</html>

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