// JavaScript Document
$(document).ready(function() {
var fileTypes = {
  // extension: 'image file'
  doc: '/wp-includes/images/crystal/document.png',
  xls: '/wp-includes/images/crystal/document.png',
  pdf: '/wp-includes/images/crystal/document.png'
};

// then, loop over the object
// using jQuery's $.each()
$.each(fileTypes, function(extension,image) {
  $('a[href$="' + extension + '"]').
    css({
	  clear: 'both',
	  display: 'block',
      paddingLeft: '56px',
      paddingTop: '20px',
      paddingRight: '0px',
      background: 'transparent url("' + image + '") no-repeat top left',
	  font: '20px bold',
	  height: '40px',
	  margin: '0px 0px 1.5em 0px'
    });
});

});