function refreshImage()
{
  var str=new Date();
  new Ajax.Request('newImage.asp', {
  method: 'get',
  parameters: { action: str },
  onSuccess: function (response){

   // var content = response.responseText;
   // var container=document.getElementById("captimagediv");
   //  container.innerHTML=content ;

    var container = $('captimagediv');
    var content = response.responseText;
    container.innerHTML=content
  //  container.update(content);
   },
  onFailure:  function (response){
        }
  });

}