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Is it possible to look at a page's source code, find a certain part and replace it with something else before the page loads? I would like to accomplish this using JavaScript so that I can use it in a Chrome extension. So something like this:
Find the google.com
<script type="text/javascript">
var URLgo = "http://google.com";
</script>
Replace with yahoo.com
<script type="text/javascript">
var URLgo = "http://yahoo.com";
</script>
608
<script type="text/javascript">
function replaceScript() {
var toReplace = 'http://google.com';
var replaceWith ='http://yahoo.com';
document.body.innerHTML = document.body.innerHTML.replace(toReplace, replaceWith);
}
</script>
Then initialise in the body tag to do on page load.
<body onload="replaceScript();">
Should work fine and replace all instances in html body code.
If it is in an iframe with id "external_iframe" then you would modify document.body.innerHTML to be:
window.frames['external_iframe'].document.body.innerHTML
Although I'm not convinced you can use it for an external site.
Seems to be some info here: Javascript Iframe innerHTML
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