ponse is received)
function ajaxSend(datasend, callback) {
  imgs.innerHTML = '<h1>Loading ...: '+ li_name +'</h1>';    // message till ajax-response

  var request =  (window.XMLHttpRequest) ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");      // sets the XMLHttpRequest instance
  datasend += '&isajax=1';    // to know in php it is ajax request
  if(imgroot != null) datasend += '&imgroot='+ imgroot;

  request.open("POST", 'imgbrowse.php');			// define the request

  // adds  a header to t