// Detect browser type
var W3C = document.getElementById? true : false; // IE5+, Netscape 6+, Opera 5+, Konqueror 2.1+, Mozilla and various Mozilla/Gecko-based browsers.
var NN4 = document.layers? true : false; //Netscape Navigator 4.x.
var IE4 = document.all? true : false; // IE version 4 (and above).


// Generate random number to determine which header to use
var numHeaders = 9;
var now = new Date();
var sec = now.getSeconds();
var headerno = (sec % numHeaders) + 1

function init()
{
	hideAllMenus();
	document['headertop'].src = "/motl/images/27/header" + headerno + "_top.gif";
	//document['headerbottom'].src = "../images/nav/header" + headerno + "_bottom.gif";
}


function hideAllMenus()
{
	var numMenus = 5;
	for (i=1; i <= numMenus; i++)
	{
		if (W3C)
		{
			eval( "document.getElementById('menu" + i + "top').style.visibility = 'hidden';");

		}
		else if (NN4)
		{
			eval( "document.layers['menu" + i + "top'].visibility = 'hidden';" );
		}
		else
		{
			eval( "menu" + i + "top.style.display = 'none';");

		}
	}

}

function hideMenu(menuid)
{
		if (W3C)
		{
			eval( "document.getElementById('menu" + menuid + "top').style.visibility = 'hidden';");

		}
		else if (NN4)
		{
			eval( "document.layers['menu" + menuid + "top'].visibility = 'hidden';" );
		}
		else
		{
			eval( "menu" + menuid + "top.style.display = 'none';");

		}
}


function showMenu(menuid)
{

	hideAllMenus();

	if (W3C)
	{
//			eval( "document.getElementById('menu" + menuid + "').style.visibility = 'visible';");
			eval( "document.getElementById('menu" + menuid + "top').style.visibility = 'visible';");

	}
	else if (NN4)
	{
//			eval( "document.layers['menu" + menuid + "'].visibility = 'show';" );
			eval( "document.layers['menu" + menuid + "top'].visibility = 'show';" );
	}
	else if (IE4)
	{
//		eval( "document.all['menu" + menuid + "'].style.visibility = 'visible';");
		eval( "document.all['menu" + menuid + "top'].style.visibility = 'visible';");

	}

}
function openWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

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_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function courseSelect()
{
	var tmp = document.courseSelectForm.CourseCode.options[document.courseSelectForm.CourseCode.selectedIndex].value;	
	if (tmp != "0")
		document.courseSelectForm.submit()

}