trying to Img fit 100% of div but prevent resizing

Question

Does anyone knows if its possible to skretch an Image to fit 100% of a div but to stay that big if you resize your browser? I need to be in a tag and not as background.

html

<div id="first">
   <img src="" alt=""/>
<div>

css

#first img{
 max-width:100%;
}

Answer 1

#first{
 width:100%;
}
#first img{
 width:inherit;
}