function changeBg(id,img)
{
  var d=document.getElementById("special_links"+id);
 d.style.backgroundImage="url(images/"+ img +")";
 //style="background-image:url(images/apartments.jpg);"
 var alink = d.getElementsByTagName('a');
 alink[0].style.color="#ffffff";
 
 }
 function changeBack(id,img)
 {
  var d=document.getElementById("special_links"+id);
  d.style.backgroundImage="url(images/"+ img +")";
   var alink = d.getElementsByTagName('a');
   alink[0].style.color="#ef3f64";
 }