// ---
/*
        GLT is developed by Robert Nyman, http://www.robertnyman.com
        For more information and copyright information, please see http://www.robertnyman.com/glt
*/
var GLT = {
        // Customization parameters
        titleClassName : "glt-elm",        
        topImagePath : "include/rounded-top.gif",
        bottomImagePath : "include/rounded-bottom.gif",
        suppressAltTooltipsInIE : true,
        timeBeforeShow : 500,
        titleOffsetX : 10,
        titleOffsetY : 10,
        fadeInTitle : true,
        fadeOutTitle : true,
        fadeStartLevel : 0.5,
        originalFadeLevel : 0.9,
        fadeIncrement : 0.1,
        timePerFadeStep : 50,
        
        // GLT parameters
        titleElm : null,
        titleTextElm : null,
        titleTopImage : null,
        titleBottomImage : null,
        elementsWithTitles : null,
        currentElm : null,
        currentTitle : "",
        currentFadeLevel : 0,
        fadeTimer : null,
        
        init : function (){
                if(document.getElementById){
                        this.elementsWithTitles = getElementsByAttribute(document, "*", "title");
                        if(this.elementsWithTitles.length > 0){
                                this.titleElm = document.createElement("div");
                                this.titleElm.className = this.titleClassName;
                                if(this.topImagePath){
                                        this.titleTopImage = document.createElement("img");
                                        this.titleTopImage.setAttribute("src", this.topImagePath);
                                        this.titleElm.appendChild(this.titleTopImage);
                                }                                
                                this.titleTextElm = document.createElement("p");
                                this.titleElm.appendChild(this.titleTextElm);
                                if(this.bottomImagePath){
                                        this.titleBottomImage = document.createElement("img");
                                        this.titleBottomImage.setAttribute("src", this.bottomImagePath);
                                        this.titleElm.appendChild(this.titleBottomImage);
                                }
                                document.body.appendChild(this.titleElm);
                                this.useMSFilter = typeof this.titleElm.style.filter != "undefined";
                                this.applyEvents();
                        }                        
                }
        },
        
        applyEvents : function (){
                var oElm;
                var strClassName;
                for(var i=0; i<this.elementsWithTitles.length; i++){
                        oElm = this.elementsWithTitles[i];
                        if(this.suppressAltTooltipsInIE){
                                oElm.setAttribute("alt", "");
                        }
                        oElm.onmouseover = GLT.mouseOverElm;
                        oElm.onmouseout = GLT.mouseOutElm;
                }
        },
        
        mouseOverElm : function (oEvent){
                var oEvent = (typeof oEvent != "undefined")? oEvent : event;
                if(typeof GLT != "undefined"){
                        GLT.startTimer(this, oEvent);
                        oEvent.cancelBubble = true;
                        oEvent.returnValue = false;
                        if(oEvent.stopPropagation){
                                oEvent.stopPropagation();
                        }
                }
        },
        
        mouseOutElm : function (oEvent){
                var oEvent = (typeof oEvent != "undefined")? oEvent : event;
                if(typeof GLT != "undefined"){
                        GLT.hideTitle(this, oEvent);
                }
        },
        
        startTimer : function (oElm, oEvent){
                if(!this.currentElm || this.currentElm != oElm || this.fadeTimer > 0){
                        if(this.fadeTimer){
                                clearTimeout(this.fadeTimer);
                        }        
                        if(this.currentElm){
                                this.hideTitle(null, false, true);
                        }
                        this.currentElm = oElm;
                        this.currentTitle = this.currentElm.getAttribute("title");
                        this.currentElm.setAttribute("title", "");
                        this.currentX = oEvent.clientX;
                        this.currentY = oEvent.clientY;
                        this.fadeTimer = setTimeout("GLT.showTitle()", GLT.timeBeforeShow);
                }
    },
        
        stopTimer : function (oElm){
                clearTimeout(GLT.fadeTimer);
    },
        
        showTitle : function (){
                this.setTitlePos();
                this.titleTextElm.innerHTML = this.currentTitle;
                this.titleElm.style.visibility = "visible";
                if(this.fadeInTitle){
                        this.currentFadeLevel = this.fadeStartLevel;
                        this.fadeIn();
                }
        },
        
        hideTitle : function (oElm, oEvent, forceHide){                
                if(this.currentElm && (oElm || forceHide)){
                        var bIsChildOfCurrentElm = false;
                        if(typeof oEvent != "undefined" && typeof oEvent == "object"){
                                var oEventTarget = (typeof oEvent.relatedTarget != "undefined")? oEvent.relatedTarget : oEvent.toElement;
                                if(oEventTarget){
                                        while(!bIsChildOfCurrentElm && oEventTarget && oEventTarget.nodeName && oEventTarget.nodeName.search(/body/i) == -1){
                                                if(oEventTarget == oElm){
                                                        bIsChildOfCurrentElm = true;
                                                        break;
                                                }
                                                oEventTarget = oEventTarget.parentNode;
                                        }
                                }
                        }
                        if(!bIsChildOfCurrentElm){
                                this.stopTimer();
                                if(this.fadeOutTitle && (typeof forceHide == "undefined" || !forceHide)){
                                        this.fadeOut();
                                }
                                else{
                                        clearTimeout(this.fadeTimer);
                                        this.currentElm.setAttribute("title", this.currentTitle);
                                        this.currentElm = null;
                                        this.titleElm.style.visibility = "hidden";
                                }
                        }
                }
        },
        
        setTitlePos : function (){        
                var arrScroll = this.getWinSizeAndScroll();
                var intTitleElmWidthAndPos = this.titleElm.offsetWidth + this.currentX + this.titleOffsetX;
                var intDiff = intTitleElmWidthAndPos - arrScroll[0];
                var intX = (intDiff > 0)? (this.currentX - intDiff) : (this.currentX + this.titleOffsetX);
                this.titleElm.style.left = intX + arrScroll[2] + "px";
                this.titleElm.style.top = this.currentY + arrScroll[3] + this.titleOffsetY + "px";
        },
        
        fadeIn : function (fadeOut){
                this.currentFadeLevel = this.currentFadeLevel + this.fadeIncrement;
                if(this.currentFadeLevel < this.originalFadeLevel){
                        this.fadeTimer = setTimeout("GLT.fadeIn()", GLT.timePerFadeStep);
                }
                else{
                        this.currentFadeLevel = this.originalFadeLevel;
                        clearTimeout(this.fadeTimer);
                }
                this.setFade();
        },
        
        fadeOut : function (){
                this.currentFadeLevel = this.currentFadeLevel - this.fadeIncrement;
                if(this.currentFadeLevel > this.fadeStartLevel){
                        this.fadeTimer = setTimeout("GLT.fadeOut()", GLT.timePerFadeStep);
                }
                else{
                        this.currentFadeLevel = this.originalFadeLevel;
                        this.hideTitle(null, false, true);
                }
                this.setFade();
        },
        
        setFade : function (){
                // This line is b/c of a floating point bug in JavaScript
                this.currentFadeLevel = Math.round(this.currentFadeLevel * 10) / 10;
                if(this.titleElm){
                        if(this.useMSFilter){
                                this.titleElm.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=" + (this.currentFadeLevel * 100) + ")";
                        }
                        else{
                                this.titleElm.style.opacity = this.currentFadeLevel;
                        }
                }
        },
        
        getWinSizeAndScroll : function (){
                var intWidth = document.body.offsetWidth;
                var intHeight = (typeof window.innerHeight != "undefined")? window.innerHeight : (document.documentElement && document.documentElement.clientHeight > 0)? document.documentElement.clientHeight : document.body.clientHeight;                
                var intXScroll = (typeof window.pageXOffset != "undefined")? window.pageXOffset : document.body.scrollLeft;                
                var intYScroll = (typeof window.window.pageYOffset != "undefined")? window.window.pageYOffset : (document.documentElement && document.documentElement.scrollTop > 0)? document.documentElement.scrollTop : document.body.scrollTop;
                return [intWidth, intHeight, intXScroll, intYScroll];
        },
        
        closeSession : function (oEvent){                
                this.removeEvent(window, "load", function(){GLT.init();}, false);
                GLT = null;
                delete GLT;
        },
        
        addEvent : function (oObject, strEvent, oFunction, bCapture){
                if(oObject){
                        if(oObject.addEventListener){
                                oObject.addEventListener(strEvent, oFunction, bCapture);
                        }
                        else if(window.attachEvent){
                                oObject.attachEvent(("on" + strEvent), oFunction)
                        }
                }
        },

        removeEvent : function (oObject, strEvent, oFunction, bCapture){
                if(oObject){
                        if(oObject.removeEventListener){
                                oObject.removeEventListener(strEvent, oFunction, false);
                        }
                        else if(window.detachEvent){
                                oObject.detachEvent(("on" + strEvent), oFunction)
                        }
                }
        }
};
// ---
GLT.addEvent(window, "load", function(){GLT.init();}, false);
// ---
// Utility functions
// ---
function getElementsByAttribute(oElm, strTagName, strAttributeName, strAttributeValue){
        var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
        var arrReturnElements = new Array();
        var oAttributeValue = (typeof strAttributeValue != "undefined")? new RegExp("(^|\\s)" + strAttributeValue + "(\\s|$)") : null;
        var oCurrent;
        var oAttribute;
        for(var i=0; i<arrElements.length; i++){
                oCurrent = arrElements[i];
                oAttribute = oCurrent.getAttribute && oCurrent.getAttribute(strAttributeName);
                if(typeof oAttribute == "string" && oAttribute.length > 0){
                        if(typeof strAttributeValue == "undefined" || (oAttributeValue && oAttributeValue.test(oAttribute))){
                                arrReturnElements.push(oCurrent);
                        }
                }
        }
        return arrReturnElements;
}
// ---
if(typeof Array.prototype.push != "function"){
        Array.prototype.push = ArrayPush;
        function ArrayPush(value){
                this[this.length] = value;
        }
}
// ---