$(document).ready(function() {
  $("#poolcolours li").each(function() {
    var liClass = $(this).attr("class");
    //alert(liClass);
    $(this).attr("style", "background-image: url('/sites/all/themes/bakewellpools/images/swatches/"+liClass+".png');");
  });
  
  //alert("Colour swatches script run.");
});