jquery - with() in percent

by Lars Moelleken

HTML

<div class="f">percentage</div>

CSS

.f
{
    width:73%;
    background-color:red;
    position:relative;
    margin:0 auto;
}

JavaScript

$(document).ready(function(){
   var f = $(".f").width() / $('.f').parent().width() * 100;
      alert(f);    
});