控制title显示时间

<br><br>
<script language=javascript>
<!--
//***********默认设置定义.*********************
tPopWait=1;		//停留tWait豪秒后显示提示。
tPopShow=6000;		//显示tShow豪秒后关闭提示
showPopStep=20;
popOpacity=70;
fontcolor="#333333";
bgcolor="#f7f7f7";
bordercolor="#000000";

//***************内部变量定义*****************
sPop=null;
curShow=null;
tFadeOut=null;
tFadeIn=null;
tFadeWaiting=null;

document.write("<style type='text/css'id='defaultPopStyle'>");
document.write(".cPopText {  background-color: " + bgcolor + ";color:" + fontcolor + "; border: 1px " + bordercolor + " solid;font-color: font-size: 12px; padding-right: 4px; padding-left: 4px; height: 20px; padding-top: 2px; padding-bottom: 2px; filter: Alpha(Opacity=0)}");
document.write("</style>");
document.write("<div id='dypopLayer' style='position:absolute;z-index:1000;' class='cPopText'></div>");


function showPopupText(){
var o=event.srcElement;
	MouseX=event.x;
	MouseY=event.y;
	if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""};
        if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""};
	if(o.dypop!=sPop) {
			sPop=o.dypop;
			clearTimeout(curShow);
			clearTimeout(tFadeOut);
			clearTimeout(tFadeIn);
			clearTimeout(tFadeWaiting);	
			if(sPop==null || sPop=="") {
				dypopLayer.innerHTML="";
				dypopLayer.style.filter="Alpha()";
				dypopLayer.filters.Alpha.opacity=0;	
				}
			else {
				if(o.dyclass!=null) popStyle=o.dyclass 
					else popStyle="cPopText";
				curShow=setTimeout("showIt()",tPopWait);
			}
			
	}
}

function showIt(){
		dypopLayer.className=popStyle;
		dypopLayer.innerHTML=sPop;
		popWidth=dypopLayer.clientWidth;
		popHeight=dypopLayer.clientHeight;
		if(MouseX+12+popWidth>document.body.clientWidth) popLeftAdjust=-popWidth-24
			else popLeftAdjust=0;
		if(MouseY+12+popHeight>document.body.clientHeight) popTopAdjust=-popHeight-24
			else popTopAdjust=0;
		dypopLayer.style.left=MouseX+12+document.body.scrollLeft+popLeftAdjust;
		dypopLayer.style.top=MouseY+12+document.body.scrollTop+popTopAdjust;
		dypopLayer.style.filter="Alpha(Opacity=0)";
		fadeOut();
}

function fadeOut(){
	if(dypopLayer.filters.Alpha.opacity<popOpacity) {
		dypopLayer.filters.Alpha.opacity+=showPopStep;
		tFadeOut=setTimeout("fadeOut()",1);
		}
		else {
			dypopLayer.filters.Alpha.opacity=popOpacity;
			tFadeWaiting=setTimeout("fadeIn()",tPopShow);
			}
}

function fadeIn(){
	if(dypopLayer.filters.Alpha.opacity>0) {
		dypopLayer.filters.Alpha.opacity-=1;
		tFadeIn=setTimeout("fadeIn()",1);
		}
}
document.onmouseover=showPopupText;
-->
</script>
<center>
<a href="http://bbs.51js.com" title="样式可自己随意调整">TOOLTIP提示什么叫做"title立即显示"</a>