// Tooltip

var tooltip = function(){
	var id = 'tt';
 	var top = 3;
	var left = 3;
	var maxw = 300;
	var speed = 10;
	var timer = 20;
	var endalpha = 95;
	var alpha = 0;
	var tt,t,c,contH,b,h;
	var ie = document.all ? true : false;
 
	return{
		show:function(contHeading,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');				 
				 //contH = document.createElement('span');
				 //contH.setAttribute('id',id  + 'contH');
				 //c.appendChild(contH);
				 //br = document.createElement('br');
				 //c.appendChild(br);
				 cont = document.createTextNode('');
				 c.appendChild(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';
			//contH.innerHTML  = contHeading;
			cont.nodeValue   = 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.body.scrollTop : e.pageY;
			var l = ie ? event.clientX + document.body.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);
		}
	};
}();