/* Browser Detection */
var isMac = false;
var isSafari = false;
var isFirefox = false;
var isMSIE = false;
var isMSIE6 = false;

if (navigator.userAgent.indexOf("Macintosh") != -1){
    isMac = true;
}

if (navigator.userAgent.indexOf("Safari") != -1){
	isSafari = true;
} else if (navigator.userAgent.indexOf("MSIE") != -1){
    isMSIE = true;
    if (navigator.userAgent.indexOf("MSIE 6.0") != -1){
	    isMSIE6 = true;
    }
} else if (navigator.userAgent.indexOf("Firefox") != -1){
	isFirefox = true;
}

/* Preloading and Rollovers */
var rolloverOn;
var rolloverOff;
var rolloverImages;
var topNav;
var topNavImages;
var topNavSection = -1;

function tnavSelect(currSection) {
    topNavSection = currSection;
    addLoadEvent(tnavSet);
}

function tnavSet(){
    topNav = document.getElementById("upper_nav");
    topNavImages = getElementsByTagClass("img", "rollover");
   if(topNavImages.length != 0){
        if (topNavSection != -1) {
            currNavImage = topNavImages[topNavSection];
            rolloverLight(currNavImage.id, currNavImage.navid);
            removeMouseListeners(currNavImage);
        }
    }
}

function preloadRollovers(roImages) {
    if (document.images) {
        var currMax = 0;
        if (roImages == null) {
            rolloverImages = getElementsByTagClass("img", "rollover").concat(getElementsByTagClass("input", "rollover"));
            rolloverOn = new Array(rolloverImages.length);
            rolloverOff = new Array(rolloverImages.length);
        } else {
            rolloverImages = roImages;
            currMax = rolloverOff.length;
        }
        for (var i = 0; i < rolloverImages.length; i++) {
            rolloverOff[i + currMax] = new Image();
            rolloverOn[i + currMax] = new Image();
            
            if (isMSIE6 && isPNG(rolloverImages[i])) {
                rolloverOff[i + currMax].src = getPNGSrc(rolloverImages[i].runtimeStyle.filter);
            } else {
                rolloverOff[i + currMax].src = rolloverImages[i].src;
            }

            rolloverOn[i + currMax].src = getRolloverSrc(rolloverOff[i + currMax].src);
            rolloverImages[i].navid = i + currMax;
            if (rolloverImages[i].name.indexOf("$") == -1) {
                rolloverImages[i].name = "rollover" + (i + currMax);
                rolloverImages[i].id = "rollover" + (i + currMax);
            }
            
            setMouseListeners(rolloverImages[i]);
        }
    }
}

function setMouseListeners(roImage){
    roImage.onmouseover = function() {
    rolloverLight(this.id, this.navid);
    };
    roImage.onmouseout = function() {
        rolloverDim(this.id, this.navid);
    };
}

function removeMouseListeners(roImage){
    roImage.onmouseover = function() {};
    roImage.onmouseout = function() {};
}

function getElementsByTagClass(tagName, className) {
    var matches = new Array();
    var matchesByTag = document.getElementsByTagName(tagName);
    for (var i = 0; i < matchesByTag.length; i++) {
        if (matchesByTag[i].className.indexOf(className) != -1) {
            matches.push(matchesByTag[i]);
        }
    }
    return matches;
}

function getSelectedSrc(offSrc) {
    var regEx;
    if (offSrc.indexOf("_on.png") == -1){
        regEx = new RegExp("_off.png");
    } else {
        regEx = new RegExp("_on.png");
    }
    return offSrc.replace(regEx, "_down.png");
}

function getRolloverSrc(offSrc) {
    var regEx = new RegExp("_off.png");
    return offSrc.replace(regEx, "_on.png");
}

function getRolloutSrc(offSrc) {
    var regEx = new RegExp("_on.png");
    return offSrc.replace(regEx, "_off.png");
}

function rolloverLight(imgID, navID) {
    if (document.images) {
		if (isMSIE6 && isPNG(document.getElementById(imgID))){
			document.getElementById(imgID).runtimeStyle.filter = getRolloverSrc(document.getElementById(imgID).runtimeStyle.filter);
		} else {
            document.getElementById(imgID).src = rolloverOn[navID].src;
		}
    }
}

function rolloverDim(imgID, navID) {
    if (document.images) {
		if (isMSIE6 && isPNG(document.getElementById(imgID))){
			document.getElementById(imgID).runtimeStyle.filter = getRolloutSrc(document.getElementById(imgID).runtimeStyle.filter);
		} else {
            document.getElementById(imgID).src = rolloverOff[navID].src;
        }
    }
}

function isPNG(img){
    return ((img.src.toLowerCase().indexOf(".png") != -1) || (img.runtimeStyle.filter.toLowerCase().indexOf(".png") != -1));
}

function getPNGSrc(pngFilter) {
    var startSearch = "AlphaImageLoader(src='";
    var start = pngFilter.indexOf(startSearch) + startSearch.length;
    var end = pngFilter.indexOf("'", start);
    return pngFilter.substring(start, end);
}

//Gets Parameter Values from QueryString
function getParamValue(paramName){
	paramName += "=";
	var paramLength=paramName.length;
	var start = -1;
	if (location.search.indexOf("?" + paramName) != -1){
		start = location.search.indexOf("?" + paramName) + 1;
	} else if (location.search.indexOf("&" + paramName) != -1){
		start = location.search.indexOf("&" + paramName) + 1;
	}
	if (start != -1){
		if (location.search.indexOf("&",start + 1) != -1){
			tempValue = location.search.substring(start + paramLength, location.search.indexOf("&",start + 1));
		}
		else {
			tempValue = location.search.substring(start + paramLength);
		}
		return tempValue;
	}
	else {
		return null;
	}
}

/* AddThis Configuration */
//var addthis_offset_top = -150;
var addthis_offset_left = 50;
var addthis_options = 'facebook, twitter, myspace, digg'; // List of Social Media Outlets
var addthis_header_color = "#FFFFFF"; // AddThis Popup Header Text Color
var addthis_header_background = "#7da1d6"; // AddThis Popup Header Background Color
var addthis_localize = {
    share_caption: "<strong>Share</strong>"
} // AddThis Popup Header Text
var addthis_share = {
} // AddThis URL to Share
var addthis_config = {
   data_ga_tracker: "pageTracker"
} // AddThis Google Analytics Integration

// Enables Assignment of Multiple window.onload Functions
function addLoadEvent(func) {   
	var oldonload = window.onload;   
	if (typeof window.onload != 'function') {   
		window.onload = func;   
	} else {   
		window.onload = function() {   
			if (oldonload) {   
				oldonload();   
			}   
			func();   
		}   
	}   
}   

/* Begin Google Tracking Code */

function onclickFix(theLink, trackName) {
    pageTracker._trackPageview(trackName);
    if (theLink.target.toLowerCase() == "_blank") {
        return true;
    } else {
        setTimeout("location.href = '" + theLink.href + "'", 500);
        return false;
    }
}


addLoadEvent(preloadRollovers);

function isAutoTrackPage() {
    var excludedPages = [""];
    var pageURL = location.pathname.toLowerCase();
    for (var i = 0; i < excludedPages.length; i++) {
        if (pageURL.indexOf(excludedPages[i].toLowerCase()) != -1) {
            return false;
        }
    }
    return true;
}