browserVars = new browserVarsObj();
if(!browserVars.type.getById) document.captureEvents(Event.MOUSEMOVE)
document.onmousemove = new Function('e', 'browserVars.updateMouse(e)');

function browserDetect(){
    this.getById = document.getElementById?true:false;
    this.layers = document.layers?true:false;
    this.ns4 = ((this.layers) && (!this.getById));
    this.ns6 = ((navigator.userAgent.indexOf('Netscape6') != -1) && (this.getById));
    this.moz = ((navigator.appName.indexOf('Netscape') != -1) && (this.getById) && (!this.ns6));
    this.ie  = ((!this.layers) && (this.getById) && (!(this.ns6 || this.moz)));
    this.opera = window.opera?true:false;
}

function browserVarsObj(){
    this.updateMouse = browserVarsObjUpdateMouse;
    this.updateVars = browserVarsObjUpdateVars;
    this.mouseX = 0;
    this.mouseY = 0;
    this.type = new browserDetect();
    this.width = 0;
    this.height = 0
    this.screenWidth = screen.width;
    this.screenHeight = screen.height;
    this.scrollWidth = 0;
    this.scrollHeight = 0;
    this.scrollLeft = 0;
    this.scrollTop = 0;
    this.updateVars();
}

function browserVarsObjUpdateMouse(e){
    if(!this.type.ie){
        this.mouseX = e.pageX;
        this.mouseY = e.pageY;
    }
    else{
        this.mouseX = window.event.clientX + this.scrollLeft;
        this.mouseY = window.event.clientY + this.scrollTop;
    }
}

function browserVarsObjUpdateVars(){
    if(!this.type.getById){
        this.width = window.innerWidth;
        this.height = window.innerHeight;
        this.scrollWidth = document.width;
        this.scrollHeight = document.height;
        this.scrollLeft = window.pageXOffset;
        this.scrollTop = window.pageYOffset;
        if(this.width < this.scrollWidth) 
            this.width -= 16
        if(this.height < this.scrollHeight) 
            this.height -= 16
    }
    else{
        if((!(this.type.ns6 || this.type.moz)) && (document.body)){
            this.width = document.body.offsetWidth;
            this.height = document.body.offsetHeight;
            this.scrollWidth = document.body.scrollWidth;
            this.scrollHeight = document.body.scrollHeight;
            this.scrollLeft = document.body.scrollLeft;
            this.scrollTop = document.body.scrollTop;
        }
        if((this.type.ns6 || this.type.moz) && (document.body)){
            this.width = window.innerWidth;
            this.height = window.innerHeight;
            this.scrollWidth = document.body.scrollWidth;
            this.scrollHeight = document.body.scrollHeight;
            this.scrollLeft = window.pageXOffset;
            this.scrollTop = window.pageYOffset;
        }
    }
}