function resize (selector,max_width,max_height) {
    
    jQuery(selector).each(function(){
        
        var width = jQuery(this).width();
        var height = jQuery(this).height();
        var ratio = (height / width );
        
        if(ratio > 1) {
            if(height >= max_height) {
                
                var new_height = max_height;
                var new_width = (new_height / ratio);
                jQuery(this).height(new_height).width(new_width);
            }
            
            
            
        }
        else if(ratio < 1) {
            if (width >= max_width) {			
                
                var new_width = max_width;
                var new_height = (new_width * ratio);
                
                
                jQuery(this).height(new_height).width(new_width);
                
            } 
            
            
        }
        else {
            if(max_width > max_height) {
                var new_width = max_height;
                var new_height = max_height;
                jQuery(this).height(new_height).width(new_width);
            } 
            else
                {
                    var new_width = max_width;
                    var new_height = max_width;
                    jQuery(this).height(new_height).width(new_width);
                }
            }
            
            
            
        }
    );
    
}