// Everybody's friend, the Dreamweaver Image Preloader
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 setNav(nav1, nav2)
{
	if (document.getElementById(nav1)) document.getElementById(nav1).className = 'active';
}

// Popup window - give me the url, width, and height, and I'll give you a popup
function popUp(url, x, y)
{
	if (isIE() == true)
	{
		y += 40;
	}
    var args = "width=" + x + ",height=" + y;
    var date = new Date();
    var now = date.getTime();
    var newName = (now).toString(10);

    window.open(url,newName,args);
}


/*** Form checking functions ***/
function checkField (val, field)
{
    var error = "";
    if (val == "")
    {
      error = "You must enter a value in the " + field + " field.\n";
    }
    return error;
}
function checkEmail(val, field)
{
    var error = "";
    if ((val == "" || val.length < 3) ||
        (val.indexOf("@") == "-1") ||
        (val.indexOf(".") == "-1"))
    {
        error = "Please enter a valid " + field + " address.\n";
    }
    return error;
}

// For popup thing
function isIE()
{
	//Detect IE5.5+
	version=0;
	if (navigator.appVersion.indexOf("MSIE")!=-1) {
		temp=navigator.appVersion.split("MSIE");
		version=parseFloat(temp[1]);
	}
	if (version >= 5.5)
	{ //NON IE browser will return 0
		return true;
	} else {
		return false;
	}
}

function isIE6()
{
	//Detect <= IE6
	version=0;
	if (navigator.appVersion.indexOf("MSIE")!=-1) {
		temp=navigator.appVersion.split("MSIE");
		version=parseFloat(temp[1]);
		if (version <= 6)
		{
			return true;
		}

	}
	return false;
}

function showDiv(target)
{
	document.getElementById(target).style.display = 'block';
}
function hideDiv(target)
{
	document.getElementById(target).style.display = 'none';
}

var curCourse = '';
function showCourse(showMe)
{
  $('#'+showMe).slideDown('normal');
  curCourse = showMe;

  $('.class-popup:visible').each(function() {
    if ($(this).attr('id') != curCourse)
    {
      $(this).slideUp('fast');
    }
  });
}
function hideCourses(keepMe)
{
  $('.class-popup:visible').each(function() {
    if ($(this).attr('id') != keepMe)
    {
      $(this).slideUp('fast');
    }
  });
}