function enableTooltips(id){
	var links,i,h;
	if(!document.getElementById || !document.getElementsByTagName) return;
	AddCss();
	h=document.createElement("span");
	h.id="btc";
	h.setAttribute("id","btc");
	h.style.position="absolute";
	document.getElementById("shopbody").appendChild(h);
	if(id==null) links=document.getElementsByTagName("a");
	else links=document.getElementById(id).getElementsByTagName("a");
	for(i=0;i<links.length;i++){
    	if(links[i].className == "KontextHilfeI"){
			Prepare(links[i]);
    	}
    }
}

function clearTooltips(){
	document.getElementById("shopbody").removeChild(document.getElementById("btc"));
	enableTooltips();
}

function Prepare(el){
	var tooltip,t,b,s,l,hint;
	t=$go.getLabel("zlgContextHelp");
	hint=CreateEl("span","hint");
	s=CreateEl("span","top");
	s.appendChild(document.createTextNode(t));
	s.innerHTML = t;
	hint.appendChild(s);
	b=CreateEl("b","bottom");
	hint.appendChild(b);
	setOpacity(hint);
	el.hint=hint;
	
	t=el.getAttribute("alt");
	if(t==null || t.length==0) t="link:";
	tooltip=CreateEl("span","tooltip");
	s=CreateEl("span","top");
	s.appendChild(document.createTextNode(t));
	s.innerHTML = t;
	tooltip.appendChild(s);
	b=CreateEl("b","bottom");
	b.innerHTML = "<br/><a onclick='clearTooltips();' class='MoreDetailLink'>"+$go.getLabel('zlgUsabilityHelpClose')+"</a>";
	tooltip.appendChild(b);
	setOpacity(tooltip);
	el.tooltip=tooltip;
	
	el.onmouseover=showTooltipHint;
	el.onmouseout=hideTooltipHint;
	el.onclick=showTooltip;
	el.onmousemove=Locate;
}

function showTooltipHint(e){
	clearTooltips();
 	var d=document.getElementById("btc");
	if(!d.childNodes.length>0){
		d.appendChild(this.hint);
		Locate(e);
	}
}

function hideTooltipHint(e){
	var d=document.getElementById("btc");
	if(d.childNodes.length>0) d.removeChild(d.firstChild);
}

function showTooltip(e){
 	hideTooltipHint(e);
 	this.onmouseout=null;
 	this.onmouseover=null;
 	this.onmousemove=null;
 	document.getElementById("btc").appendChild(this.tooltip);
	Locate(e);
}

function hideTooltip(e){
	var d=document.getElementById("btc");
	if(d.childNodes.length>0) d.removeChild(d.firstChild);
}


function setOpacity(el){
	el.style.filter="alpha(opacity:95)";
	el.style.KHTMLOpacity="0.95";
	el.style.MozOpacity="0.95";
	el.style.opacity="0.95";
}

function CreateEl(t,c){
	var x=document.createElement(t);
	x.className=c;
	x.style.display="block";
	return(x);
}

function AddCss(){
	var l=CreateEl("link");
	l.setAttribute("type","text/css");
	l.setAttribute("rel","stylesheet");
	l.setAttribute("href","css/bt.css");
	l.setAttribute("media","screen");
	document.getElementsByTagName("head")[0].appendChild(l);
}

function Locate(e)
{
	var posx=0,posy=0;
	if(e==null) e=window.event;
	if(e.pageX || e.pageY)
	{
    	posx=e.pageX; posy=e.pageY;
    }
	else if(e.clientX || e.clientY)
	{
    	if(document.documentElement.scrollTop)
    	{
        	posx=e.clientX+document.documentElement.scrollLeft;
        	posy=e.clientY+document.documentElement.scrollTop;
        }
    	else
    	{
        	posx=e.clientX+document.body.scrollLeft;
        	posy=e.clientY+document.body.scrollTop;
    	}
	}
	
	//weil an shopbody angehängt
	posx = posx - getAbsoluteX(document.getElementById("shophead"));
	posy = posy - getAbsoluteY(document.getElementById("shopbody"));
		
 	document.getElementById("btc").style.top= (posy+10)+"px";
	document.getElementById("btc").style.left= (posx-20)+"px";
}

// Findet die absolute y Position eines Elementes raus
function getAbsoluteY(elm){
   var y = 0;
   if (elm && typeof elm.offsetParent != "undefined") {
    while (elm && typeof elm.offsetTop == "number") {
   		y += elm.offsetTop;
       	elm = elm.offsetParent;
     }
   }
   return y;
}

// Findet die absolute x Position eines Elementes raus
function getAbsoluteX (elm) {
   var x = 0;
   if (elm && typeof elm.offsetParent != "undefined") {
     while (elm && typeof elm.offsetLeft == "number") {
       x += elm.offsetLeft;
       elm = elm.offsetParent;
     }
   }
   return x;
}