function loadjscssfile(filename, filetype){
 if (filetype=="js"){ //if filename is a external JavaScript file
  var fileref=document.createElement('script')
  fileref.setAttribute("type","text/javascript")
  fileref.setAttribute("src", filename)
 }
 else if (filetype=="css"){ //if filename is an external CSS file
  var fileref=document.createElement("link")
  fileref.setAttribute("rel", "stylesheet")
  fileref.setAttribute("type", "text/css")
  fileref.setAttribute("href", filename)
 }
 if (typeof fileref!="undefined")
  document.getElementsByTagName("head")[0].appendChild(fileref)
}

function importXML(xml)
{
	try //Internet Explorer
	{
		xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
		xmlDoc.async="false";
		xmlDoc.loadXML(xml);
	}
	catch(e)
	{
		try //Firefox, Mozilla, Opera, etc.
	    {
		    parser=new DOMParser();
		    xmlDoc=parser.parseFromString(xml,"text/xml");
	    }
 	    catch(e) {}
	}
	return xmlDoc;
}

function isDefined(variable)
{
	if ( typeof( window[ variable ] ) != "undefined" )
	   return true;
	return false
}