jQuery.fn.supersleight = function(settings) {
  settings = jQuery.extend({
    imgs: true,
    backgrounds: true,
    shim: 'x.gif',
    apply_positioning: true
  }, settings);
  
  return this.each(function(){
    if (jQuery.browser.msie && parseInt(jQuery.browser.version, 10) < 7 && parseInt(jQuery.browser.version, 10) > 4) {
      jQuery(this).find('*').andSelf().each(function(i,obj) {
        var self = jQuery(obj);
        // background pngs
        if (settings.backgrounds && self.css('background-image').match(/\.png/i) !== null) {
          var bg = self.css('background-image');
          var src = bg.substring(5,bg.length-2);
          var mode = (self.css('background-repeat') == 'no-repeat' ? 'crop' : 'scale');
          var styles = {
            'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='" + mode + "')",
            'background-image': 'url('+settings.shim+')'
          };
          self.css(styles);
        };
        // image elements
        if (settings.imgs && self.is('img[src$=png]')){
          var styles = {
            'width': self.width() + 'px',
            'height': self.height() + 'px',
            'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + self.attr('src') + "', sizingMethod='scale')"
          };
          self.css(styles).attr('src', settings.shim);
        };
        // apply position to 'active' elements
        if (settings.apply_positioning && self.is('a, input') && (self.css('position') === '' || self.css('position') == 'static')){
          self.css('position', 'relative');
        };
      });
    };
  });
};