function getElementsByClassName(clsName,objParent,htmlTag){
	if (!objParent){
		objParent=document;
	}
	if (!htmlTag){
		htmlTag='div';
	}
	var arr=new Array();
	var elems=objParent.getElementsByTagName(htmlTag);
	for(var cls,i=0;(elem=elems[i]);i++){
		if((" "+elem.className+" ").indexOf(" "+clsName+" ")!=-1){
			arr[arr.length]=elem;
		}
	}
	return arr;
}
function enableTooltips(els){
	var links,i,h,sel;
	if(!document.getElementById || !document.getElementsByTagName) return;
	AddCss();
	h=document.createElement("div");
	h.id="btc";
	h.setAttribute("id","btc");
	h.style.position="absolute";
	document.getElementsByTagName("body")[0].appendChild(h);
	for(i=0;i<els.length;i++){
		Prepare(els[i]);
	}
}
function Prepare(el){
	var tooltip,t,b,s,l,lstr,addstr,m,mw,v,xt;
	t=el.getAttribute("title");
	t = t.replace(/\{/g,"<");
	t = t.replace(/\}/g,">");
	b=CreateEl("div","bottom");
	addstr="";
	lstr="";
	/*l=el.getAttribute("value");
	lstr=addstr+l;
	if(lstr.length>50) lstr=lstr.substr(0,47)+"..."; */
	el.removeAttribute("title");
	tooltip=CreateEl("div","tooltip");
	s=CreateEl("div","top");
	s.appendChild(document.createTextNode(t));
	tooltip.appendChild(s);
	s.innerHTML=t;
	b.appendChild(document.createTextNode(lstr));
	tooltip.appendChild(b);
	setOpacity(tooltip);
	el.tooltip=tooltip;
	el.onmouseover=showTooltip;
	el.onmouseout=hideTooltip;
	el.onmousemove=Locate;
}
function showTooltip(e){
	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","http://hz.house365.com/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;
		}
	}
	document.getElementById("btc").style.top=(posy+2)+"px";
	document.getElementById("btc").style.left=(posx+2)+"px";
}