how to get "real" url from img src in javascript

I have piece of offline html like so:

<img src="../img/button.png"/>

and when I try to access the src attribute in JS, I get a different 开发者_StackOverflowvalue than what's written in the html:

var s = myimg.src; // equals 'file:///V:/test/test1/img/button.png'

It's as if the value got resolved somewhere between the html and my call to 'src' attribute. How do I get the "original" value instead of the resolved one?

tnx

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use getAttribute

var s = myimg.getAttribute('src')

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If you read the attribute instead of the src property, you get the original value:

var s = myimg.getAttribute('src');