function nahled(url) {
              window.open(url,'preview','toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=0,resizable=0,width=660,height=500').focus();
               
      }
      
function book(url) {
              window.open(url,'book','toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,width=600,height=650').focus();      
       }