How to remove height and width?

To make it work from all ways, you need to remove both attribute and css. This is work on my code.

$('your-image')
   .removeAttr("width").removeAttr("height")
   .css({ width: "", height: "" });

This is a VERY simple solution with jQuery. I found the answer at wpwizard.net.

Here's the URL: http://wpwizard.net/jquery/remove-img-height-and-width-with-jquery/

Here's the jQuery:

<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript">
jQuery.noConflict();
jQuery(document).ready(function($){

    $('img').each(function(){ 
        $(this).removeAttr('width')
        $(this).removeAttr('height');
    });

});
</script>

Try to use this code:

$('your-image').css({ 
  width: '',
  height: ''
});

If you want to set the "original" image dimensions try this:

$('your-image').css({ 
  width: 'auto',
  height: 'auto'
});