/* Just some misc scripts and functions. Jeff Nadeau 2008 */


function alumni(smallpath){
	ajaxObj.open('get', '/mmstc/students/alumni/'+smallpath+'.html');	
    ajaxObj.onreadystatechange = function(){
		if(ajaxObj.readyState == 4){
			if(BrowserDetect.browser == "Explorer" && BrowserDetect.version < 7){ // Nobody likes you, Internet Explorer
				if(document.documentElement){
					$('alumni_lightbox').style.top = document.documentElement.scrollTop + (document.documentElement.clientHeight/2 - 137) + "px";
					$('drop').style.top = document.documentElement.scrollTop + "px";
					$('drop').style.height = document.documentElement.clientHeight + "px";
				} else {
					$('alumni_lightbox').style.top = document.body.scrollTop + (document.body.clientHeight/2 - 137) + "px";
					$('drop').style.top = document.body.scrollTop + "px";
					$('drop').style.height = document.body.clientHeight + "px";
				}
			}
			
			$('alumni_lightbox').style.opacity = 0;
			$('alumni_lightbox').style.filter = "alpha(Opacity=0)";
			$('drop').style.opacity = 0;
			$('drop').style.filter = "alpha(Opacity=0)";
			
			$('drop').onclick = hideAlumni;
			$('alumni_lightbox').onclick = hideAlumni;
			
			$('alumni_lightbox_contents').innerHTML = ajaxObj.responseText;
			$('alumni_lightbox').style.display = "block";
			$('drop').style.display = "block";
			var fadeIn = new Fx.Style('alumni_lightbox', 'opacity').start(0,1);
			var fadeDropIn = new Fx.Style('drop', 'opacity').start(0,0.75);
			
		}
	};
    ajaxObj.send(null);
}

function hideAlumni(){
	var fadeOut = new Fx.Style('alumni_lightbox', 'opacity', {onComplete:alumniDisplay}).start(1,0);
	var fadeDropOut = new Fx.Style('drop', 'opacity').start(0.75,0);
}

function alumniDisplay(){
	$('alumni_lightbox').style.display = "none";
	$('alumni_lightbox').onclick = function(){ void(0); }
	$('drop').style.display = "none";
	$('drop').onclick = function(){ void(0); }
	$('alumni_lightbox_contents').innerHTML = "";
}

function showCredits(){
	if(BrowserDetect.browser == "Explorer" && BrowserDetect.version < 7){ 
		if(document.documentElement){
			$('credits').style.top = document.documentElement.scrollTop + (document.documentElement.clientHeight/2 - 70) + "px";
			$('drop').style.top = document.documentElement.scrollTop + "px";
			$('drop').style.height = document.documentElement.clientHeight + "px";
		} else {
			$('credits').style.top = document.body.scrollTop + (document.body.clientHeight/2 - 70) + "px";
			$('drop').style.top = document.body.scrollTop + "px";
			$('drop').style.height = document.body.clientHeight + "px";
		}
	}

	$('credits').style.opacity = 0;
	$('credits').style.filter = "alpha(Opacity=0)";
	$('drop').style.opacity = 0;
	$('drop').style.filter = "alpha(Opacity=0)";
	
	$('credits').style.display = "block";
	$('drop').style.display = "block";
	var fadeIn = new Fx.Style('credits', 'opacity').start(0,1);
	var fadeDropIn = new Fx.Style('drop', 'opacity').start(0,0.4);
}

function hideCredits(){
	var fadeOut = new Fx.Style('credits', 'opacity', {onComplete:creditsDisplay}).start(1,0);
	var fadeDropOut = new Fx.Style('drop', 'opacity').start(0.4,0);
}

function creditsDisplay(){
	$('credits').style.display = "none";
	$('drop').style.display = "none";
}

function createRequestObject() {
    var reqobj;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        reqobj = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        reqobj = new XMLHttpRequest();
    }
    return reqobj;
}

var ajaxObj = createRequestObject();

//Browser detect by Peter-Paul Koch, quirksmode.org
//I use it because it's convenient.
var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();