var tooltip=function(){
    var id = 'tt';
    var top = 3;
    var left = 3;
    var maxw = 450;
    var speed = 10;
    var timer = 20;
    var endalpha = 95;
    var alpha = 0;
    var tt,t,c,b,h;
    var ie = document.all ? true : false;
    return{
        show:function(v,w){
            if(tt == null){
                tt = document.createElement('div');
                tt.setAttribute('id',id);
                t = document.createElement('div');
                t.setAttribute('id',id + 'top');
                c = document.createElement('div');
                c.setAttribute('id',id + 'cont');
                b = document.createElement('div');
                b.setAttribute('id',id + 'bot');
                tt.appendChild(t);
                tt.appendChild(c);
                tt.appendChild(b);
                document.body.appendChild(tt);
                tt.style.opacity = 0;
                tt.style.filter = 'alpha(opacity=0)';
                document.onmousemove = this.pos;
            }
            tt.style.display = 'block';
            c.innerHTML = v;
            tt.style.width = w ? w + 'px' : 'auto';
            if(!w && ie){
                t.style.display = 'none';
                b.style.display = 'none';
                tt.style.width = tt.offsetWidth;
                t.style.display = 'block';
                b.style.display = 'block';
            }
            if(tt.offsetWidth > maxw){tt.style.width = maxw + 'px'}
            h = parseInt(tt.offsetHeight) + top;
            clearInterval(tt.timer);
            tt.timer = setInterval(function(){tooltip.fade(1)},timer);
        },

pos:function(e){
// For IE6 compatibity - nick 22/08/2008 11:32
var u = 0, l = 0;
if( typeof( window.pageYOffset ) == 'number') {
//Netscape compliant
u = window.pageYOffset;
l = window.pageXOffset;
} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
//DOM compliant
u = document.body.scrollTop;
l = document.body.scrollLeft;
} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
//IE6 standards compliant mode
u = document.documentElement.scrollTop;
l = document.documentElement.scrollLeft;
}

u = ie ? event.clientY + u : e.pageY;
l = ie ? event.clientX + l : e.pageX;
tt.style.top = (u - h) + 'px';
tt.style.left = (l + left) + 'px';
},

        fade:function(d){
            var a = alpha;
            if((a != endalpha && d == 1) || (a != 0 && d == -1)){
                var i = speed;
                if(endalpha - a < speed && d == 1){
                    i = endalpha - a;
                }else if(alpha < speed && d == -1){
                    i = a;
                }
                alpha = a + (i * d);
                tt.style.opacity = alpha * .01;
                tt.style.filter = 'alpha(opacity=' + alpha + ')';
            }else{
                clearInterval(tt.timer);
                if(d == -1){tt.style.display = 'none'}
            }
        },

        hide:function(){
            clearInterval(tt.timer);
            tt.timer = setInterval(function(){tooltip.fade(-1)},timer);
        }
    };
}();