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How do you replace a URL in an "IMG" tag with Javascript

Posted on 2014-10-27
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Last Modified: 2014-10-28
I moved a website and the images are no longer at the same URL, but I don't want to manually change all the pages on the website.  I'd like to write some javascript to add to the page to change all instances of the URL in the image tag, since I can easily add the code across the entire website.

Old Site IMG Tag
<img alt="" src="http://www.domain.com/entertainment/music/2007/images/04.000.jpg" width="270" align="left" border="0" id="exifviewer-img-1" exifid="-2145830154" oldsrc="http://www.domain.com/entertainment/music/2007/images/04.000.jpg">

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Desired New Site IMG Tag
<img alt="" src="http://files.domain.com/entertainment/music/2007/images/04.000.jpg" width="270" align="left" border="0" id="exifviewer-img-1" exifid="-2145830154" oldsrc="http://files.domain.com/entertainment/music/2007/images/04.000.jpg">

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Basically, I need to change www.domain.com to files.domain.com
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Question by:dauyeung
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2 Comments
 

Assisted Solution

by:expertexchangers
expertexchangers earned 50 total points
ID: 40407770
Hi
You can do as follows. Please check the example I created http://jsfiddle.net/913e8ryg/
<img alt="" src="http://files.domain.com/entertainment/music/2007/images/04.000.jpg" width="270" align="left" border="0" id="exifviewer-img-1" exifid="-2145830154" oldsrc="http://files.domain.com/entertainment/music/2007/images/04.000.jpg">

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var Image = document.getElementsByTagName('img')[0].src
var newUrl = Image.replace("http://www.domain.com", "http://files.domain.com");
alert(newUrl);

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The other way will using a texteditor and find replace all. Better is to create a global variable and assign url to it and use that variable on everyplace so that if in future you need to change url you just need to change at one place.
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Accepted Solution

by:
leakim971 earned 450 total points
ID: 40408133
put this at the end of the page (just before </body>):
<script>
var images = document.getElementsByTagName("img");
for(var i=0;i<images.length;i++) {
     if(images[i].src.indexOf("http://www.domain.com")==0) {
        images[i].src = images[i].src.replace("http://www.domain.com", "http://files.domain.com");
     }
}
</script>

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