var tooltip=function(){
	var id = 'tt';
	var top = 5;
	var left = 5;
	var maxw = 500;
	var speed = 10;
	var timer = 20;
	var endalpha = 100;
	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);
				document.body.appendChild(tt);
				tt.style.opacity = 90;
				tt.style.filter = 'alpha(opacity=0)';
				document.onmousemove = this.pos;
			}
			tt.style.display = 'block';
			tt.innerHTML = v;
			tt.style.width = w ? w + 'px' : 'auto';
			if(!w && ie){
				tt.style.width = tt.offsetWidth;
			}
			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 myWidth = 0, myHeight = 0;
 			if( typeof( window.innerWidth ) == 'number' ) {
    		//Non-IE
    		myWidth = window.innerWidth;
    		myHeight = window.innerHeight;
  			} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    		//IE 6+ in 'standards compliant mode'
    		myWidth = document.documentElement.clientWidth;
    		myHeight = document.documentElement.clientHeight;
  			} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    		//IE 4 compatible
   			myWidth = document.body.clientWidth;
    		myHeight = document.body.clientHeight;
	  		}
			var u = ie ? event.clientY + document.documentElement.scrollTop : e.pageY;
			var l = ie ? event.clientX + document.documentElement.scrollLeft : e.pageX;
			if(myWidth/2 > l) {
			tt.style.left = (l + left) + 'px';
			} else {
			var tmp = tt.offsetWidth;
			tt.style.left = (l - tmp) + 'px';
			}
			if(myHeight/2 > u) {
			tt.style.top = (u + 5) + 'px';
			} else {
			tt.style.top = (u - h) + 'px';
			}
			
			
			//tt.innerHTML = myWidth + " " + myHeight;
		},
		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);
		}
	};
}();