function dhtmlLoadScript(url) {
   var e = document.createElement("script");
   e.src = url;
   e.type="text/javascript";
   document.getElementsByTagName("head")[0].appendChild(e);
}
function loadcss(url) {
   var cssNode = document.createElement('link');
   cssNode.type = 'text/css';
   cssNode.rel = 'stylesheet';
   cssNode.href = url;
   cssNode.media = 'screen';
   document.getElementsByTagName("head")[0].appendChild(cssNode);
}