function goNext(url) {
   var data = document.forms[0].userName.value;
   location.href = url + "?" + escape(data);
}

function readData() {
   var srchString = unescape(location.search.substring(1, location.search.length));
   if (srchString.length > 0) {
      document.forms[0].uitleencode.value = srchString;
   }
}

var newWindow;
function popUp(doc) {
    var width = '800';
    var height = '540';
    var url = 'uitleen/' + doc;
    var left = parseInt((screen.availWidth/2) - (width/2));
    var top = parseInt((screen.availHeight/2) - (height/2));
    var windowFeatures = "width=" + width + ",height=" + height + ",resizable" + ",left=" + left + ",top=" + top;
    newWindow = window.open(url,"subWind", windowFeatures);
}