jQuery(document).ready(function($) {
     jQuery("#single-column .entry-content img").each(function() {

        if(jQuery(this).attr("width")>420){

            src=jQuery(this).attr("src");
            width= jQuery(this).attr("width");
            height= jQuery(this).attr("height");
            ratio = height/width;

            newheight=433*ratio;
            newheight=Math.round(newheight);


            width= jQuery(this).attr("width",433);
            height= jQuery(this).attr("height",newheight);
         }
    });

})


//src="http://dev.menly.fr/wp-content/themes/deadline/timthumb.php?src=http://dev.menly.fr/wp-content/uploads//2011/03/tanker-on-fire-escape-300x2121.jpg&h=75&w=75"