Don't know how to make script with preloaded images_问答_开发者

Don't know how to make script with preloaded images

开发者 https://www.devze.com 2023-01-09 11:28 出处：网络

Can someone look over this and tell me what I have to do to get the images to show up? <head> <SCRIPT LANGUAGE=\"JavaScript\">

Can someone look over this and tell me what I have to do to get the images to show up?

<head>

<SCRIPT LANGUAGE="JavaScript">



<!-- //Begin

function changeImage(filename)
{
  mainimage.src = filename;
}

//  End -->
</script>

</head>



<body>

<p>
<a href="javascript:changeImage('image-viewer/image1.jpg')">Image 1</a>
<a href="javascript:changeImage('image-viewer/image2.jpg')">Image 2</a>
<a href="javascript:changeImage('image-viewer/image3.jpg')">Image 3</a>
<a href="javascript:changeImage('image-viewer/image4.jpg')">Image 4</a>
</p>
<p>
<img name="mainimage" src="image-vi开发者_JS百科ewer/blank.jpg"></p>


<p><center>
<font face="arial, helvetica" size"-2">
</center><p>


</script>
</font></body>
</html>

<!DOCTYPE html>
<html>
    <head>
        <title>Sample page</title>   
        <script type="text/javascript">

        function changeImage(replacement)
        {
            document.getElementById("main_image").src = replacement;
            return false;   
        }

        </script>
    </head>
    <body>

        <ul>
            <li><a href="javascript:changeImage('image1.jpg')">Image 1</a></li>
            <li><a href="javascript:changeImage('image2.jpg')">Image 2</a></li>
            <li><a href="javascript:changeImage('image3.jpg')">Image 3</a></li>
            <li><a href="javascript:changeImage('image4.jpg')">Image 4</a></li>
        </ul>

        <p>
            <img id="main_image" src="image-viewer/blank.jpg" alt="" />
        </p>

    </body>
</html>

Change your function to:

function changeImage(filename) {
  document.main_image.src=filename;
  void(0);   
}

A good friend helped me look this up

mainimage.src = filename; is wrong, and should instead be

<img name="mainimage" src="image-viewer/blank.jpg">

should be

<img id ="mainimage" src="image-viewer/blank.jpg">

And then this:

mainimage.src = filename;

should be

document.getElementById("mainimage").setAttribute("src", filename);

there's an extra tag in the end.

I think she's having more of a problem with her image locations, though. He needs more info about project

Edit : What might be happening is she has the html file in the same folder as the images which really won't work. because if all her files are in c:/image-viewer/ with no subdirectories and the html file is c:/image-viewer/index.html. Therefore she needs a new folder for the images

Because the script is asking for c:/image-viewer/image-viewer/image1.jpg as opposed to c:/image-viewer/image1.jpg

If this isn't for a class, she needs to learn to write standards compliant code. Look up DOM

if all the files are in one folder, then she has to do away with image-viewer/ in front of the file names.