/* tooltips */

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.getElementsByTagName("body")[0].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=='helpimg') {
	  	Prepare(links[i]);
      }
   }
}
function Prepare(el) {
   var tooltip, t, b, s, l;
   t = el.getAttribute("title");
   if(t == null || t.length == 0) t = "link:";
   el.removeAttribute("title");
   tooltip = CreateEl("span", "tooltip");
   s = CreateEl("span", "top");
   s.appendChild(document.createTextNode(t));
   tooltip.appendChild(s);
   b = CreateEl("b", "bottom");
   l = el.getAttribute("href");
   if(l.length > 30) l = l.substr(0, 27) + "...";
   // link onderin uitschakelen!
   //b.appendChild(document.createTextNode(l));
   tooltip.appendChild(b);
   setOpacity(tooltip);
   el.tooltip = tooltip;
   el.onmouseover = showTooltip;
   el.onmouseout = hideTooltip;
   el.onmousemove = Locate;
   }
function showTooltip(e) {
   if(jsIsIE6()){
  // 	frame = jsAddIFrame($('btc'));
 //  	frame.style.height = $('tooltip').style.height;
 //  	frame.style.width = $('tooltip').style.width;
   	
   }
   $('btc').appendChild(this.tooltip);
   Locate(e);
   }
function hideTooltip(e) {
   if(jsIsIE6()){
 //  	jsRemoveIFrame($('btc'));
   }
   var d = $('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", "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;
         }
      }
   document.getElementById("btc").style.top = (posy - 15) + "px";
   document.getElementById("btc").style.left = (posx + 5) + "px";
}



/* end tooltips */