var banner_x = 983;

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function determineWidth() {
	var browser_width;
	if(document.all) browser_width = document.body.clientWidth;
	else if ((document.layers) || (document.getElementById)) { browser_width = innerWidth; browser_width -= 30; }
	if (browser_width < banner_x) { return false; }
	else { return true;	}
}

function checkVisibility() {
	determinator = determineWidth();
	if(determinator) if(document.all) banner.style.display = "inline"; else MM_showHideLayers('banner','','show');
	else if (document.all) banner.style.display = "none"; else MM_showHideLayers('banner','','hide'); 
}