function shownav_bike() {
		document.getElementById('nav_bike').style.visibility='visible';
	}
	function hidenav_bike() {
		document.getElementById('nav_bike').style.visibility='hidden';
	}
	
	var xmlhttp=false;
	var ds="";
	/*@cc_on @*/

	/*@if (@_jscript_version >= 5)

		try {
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (E) {
				xmlhttp = false;
			}
		}

	@else

		xmlhttp = false;

	@end @*/

	if (!xmlhttp && typeof XMLHttpRequest!='undefined') {

		try {
		  xmlhttp = new XMLHttpRequest();
		} catch (e) {
		  xmlhttp = false;
		}

	}

	function loadDoc(docname) {

		if (xmlhttp) {
		
		xmlhttp.open("GET", docname,true);
		 xmlhttp.onreadystatechange=function() {
		  if (xmlhttp.readyState==4) {
			   ds=xmlhttp.responseText;
			document.getElementById('content').innerHTML=ds;
		  }
		 }
		 xmlhttp.send(null)

		 }

	}