var myImgGalleries = new Array();
 
  function changeSrc(imgId)
  {
   document.getElementById("myImage").src = document.getElementById(imgId).src;
   //turn them all off...
   for(i= 1; i<=myImgGalleries.length;i++){
    document.getElementById(myImgGalleries[i]).className = "thumb_unselected"; 
    
    document.getElementById(imgId).className = "thumb_selected"; 
    document.getElementById(imgId).blur();
   }
   
   
   
  }