实现鼠标经过超链时的提示图层

代码如下：
<SCRIPT>
var oPopup = window.createPopup();
function rdl_doClick(){
var oMessage=document.all("oMessage");
with (oPopup.document.body) {
style.backgroundColor="lightyellow";
style.border="solid black 1px";
innerHTML=oMessage.value;
}
oPopup.show(70, 70, 180, 60);
}
</SCRIPT>
<Input id=oMessage size=40 value=点击弹出窗口外面的区域关闭他。> <BR><BR><A onmouseover=rdl_doClick() onmouseout=oPopup.hide(); href="#">显示弹出窗口 </A>--------------------------------------------------------------------
<STYLE type=text/css>BODY {
MARGIN-TOP: 0px; FONT-SIZE: 9pt; MARGIN-LEFT: 4px; MARGIN-RIGHT: 0px; FONT-FAMILY: "宋体"
}
A {
FONT-WEIGHT: 400; FONT-SIZE: 13px; COLOR: black; TEXT-DECORATION: none
}
A:hover {
FONT-WEIGHT: 400; FONT-SIZE: 13px; COLOR: red; TEXT-DECORATION: underline
}
A:active {
FONT: 9pt "宋体"; CURSOR: hand; COLOR: #ff0033
}
</STYLE>
<SCRIPT>
function show(tips,flag,url){
var my_tips=document.all.mytips;
if(flag){
my_tips.style.display="";
if (url!=null){my_tips.innerHTML="<img src='" url "'align=left>" tips;}
else{ my_tips.innerHTML=tips;}
my_tips.style.left=event.clientX 10;
my_tips.style.top=event.clientY 10;
}
else
{
my_tips.style.display="none";
}
}
</SCRIPT>
<A onmousemove=show(this.tips,1) onmouseout=show(this.tips,0) href="#" tips="自定义提示">测试链接</A> <A onmousemove="show(this.tips,1,'http://be10.ods.org/51js/images/standard/online_member.gif')" onmouseout=show(this.tips,0) href="#" tips="又一个自定义提示">测试链接</A> <A onmousemove="show(this.tips,1,'http://be10.ods.org/51js/images/standard/online_moderator.gif')" onmouseout=show(this.tips,0) href="#" tips="中华人民共和国中华人民共和国自定义提示">测试链接</A>
<div id=mytips style="BORDER-RIGHT: gray 1px solid; BORDER-TOP: gray 1px solid; DISPLAY: none; FONT-SIZE: 9pt; FILTER: progid:DXImageTransform.Microsoft.Shadow(color=#999999,direction=135,strength=3); BORDER-LEFT: gray 1px solid; WIDTH: 150px; COLOR: red; BORDER-BOTTOM: gray 1px solid; POSITION: absolute; HEIGHT: 16px; BACKGROUND-COLOR: #ffffff"></div>----------------------------------------------------------------------
<SCRIPT language=JavaScript>
//***********默认配置定义.*********************
tPopWait=50;//停留tWait豪秒后显示提示。
tPopShow=5000;//显示tShow豪秒后关闭提示
showPopStep=20;
popOpacity=99;
//***************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: #F8F8F5;color:#000000; border: 1px #000000 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>

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