var tooltip=function(){
   var id = 'tt';
   var top = 3;
   var left = 3;
   var maxw = 400;
   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){
         var u = ie ? event.clientY + document.documentElement.scrollTop : e.pageY;
         var l = ie ? event.clientX + document.documentElement.scrollLeft : 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);
      }
   };
}();