var dom = (document.getElementById)? true : false;
var nn4a = (document.layers)? true : false;
var ie4a = (!dom && document.all)? true : false;

var agt = navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);
var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1));
var is_nav6 = (is_nav && (is_major == 5));
var is_opera = (agt.indexOf("opera") != -1);
var is_gecko = (agt.indexOf('gecko') != -1);


function sideBar() {
	var cx;
	if (dom)  cx=document.body.offsetWidth;
	if (nn4a) cx=document.body.clientWidth; 
	var sideBar=document.getElementById("sidebar");
	var clearTotal=995;
	if(cx > clearTotal) {
		sideBar.style.display = "block";
		sideBar.style.visibility = "visible";
	} else {
		sideBar.style.display = "none";
		sideBar.style.visibility= "hidden";
	}

}

window.onresize=window.onload=sideBar;