LUKIYA'S NEVERLAND

今天开发时找参考界面，无意浏览到一个网站(http://www.ioocn.com/)，发现他的提示信息功能很有意思。

查看了下代码，页面里很干净，并没有什么隐藏层。于是到js里找，果然找到一段代码。先记这里，晚上回去整理成技术文档形式。

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// 信息提示脚本
var pltsPop=null;
var pltsoffsetX = 10;? // 弹出窗口位于鼠标左侧或者右侧的距离；3-12 合适
var pltsoffsetY = 15;? // 弹出窗口位于鼠标下方的距离；3-12 合适
var pltsPopbg="#FFFFEE"; //背景色
var pltsPopfg="#ffffff"; //前景色
var pltsTitle="";
document.write('<div id=pltsTipLayer style="display: none;position: absolute; z-index:10001"></div>');
function pltsinits()
{
??? document.onmouseover?? = plts;
??? document.onmousemove = moveToMouseLoc;
}
function plts()
{? var o=event.srcElement;
??? if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""};
??? if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""};
??? pltsPop=o.dypop;
??? if(pltsPop!=null&&pltsPop!=""&&typeof(pltsPop)!="undefined")
??? {
?pltsTipLayer.style.left=-1000;
?pltsTipLayer.style.display='';
?var Msg=pltsPop.replace(/\n/g,"<br>");
?Msg=Msg.replace(/\0x13/g,"<br>");
?var re=/\{(.[^\{]*)\}/ig;
?if(!re.test(Msg))pltsTitle="信息提示";
?else{
?? re=/\{(.[^\{]*)\}(.*)/ig;
? ?? pltsTitle=Msg.replace(re,"$1")+"&nbsp;";
?? re=/\{(.[^\{]*)\}/ig;
?? Msg=Msg.replace(re,"");
?? Msg=Msg.replace("<br>","");}
?? var attr=(document.location.toString().toLowerCase().indexOf("list.asp")>0?"nowrap":"");
?????? ?var content =
????? ?'<table style="FILTER:alpha(opacity=80) shadow(color=#bbbbbb,direction=135);" id=toolTipTalbe border=0><tr><td width="100%"><table class=tableBorder cellspacing="1" cellpadding="0" style="width:100%">'+
????? ?'<tr id=pltsPoptop><th height=18 valign=bottom><font color=white><b><p id=topleft align=left>↖'+pltsTitle+'</p><p id=topright align=right style="display:none">'+pltsTitle+'↗</font></b></font></th></tr>'+
????? ?'<tr><td "+attr+" class=tablebody1 style="padding-left:14px;padding-right:14px;padding-top: 6px;padding-bottom:6px;line-height:135%">'+Msg+'</td></tr>'+
????? ?'<tr id=pltsPopbot style="display:none"><th height=18 valign=bottom><font color=white><b><p id=botleft align=left>↙'+pltsTitle+'</p><p id=botright align=right style="display:none">'+pltsTitle+'↘</font></b></font></th></tr>'+
????? ?'</table></td></tr></table>';
?????? ?pltsTipLayer.innerHTML=content;
?????? ?toolTipTalbe.style.width=Math.min(pltsTipLayer.clientWidth,document.body.clientWidth/2.2);
?????? ?moveToMouseLoc();
?????? ?return true;
?????? }
??? else
??? {
??? ?pltsTipLayer.innerHTML='';
????? ?pltsTipLayer.style.display='none';
?????? ?return true;
??? }
}

function moveToMouseLoc()
{
?if(pltsTipLayer.innerHTML=='')return true;
?var MouseX=event.x;
?var MouseY=event.y;
?//window.status=event.y;
?var popHeight=pltsTipLayer.clientHeight;
?var popWidth=pltsTipLayer.clientWidth;
?if(MouseY+pltsoffsetY+popHeight>document.body.clientHeight)
?{
?? ?popTopAdjust=-popHeight-pltsoffsetY*1.5;
?? ?pltsPoptop.style.display="none";
?? ?pltsPopbot.style.display="";
?}
? else
?{
??? ?popTopAdjust=0;
?? ?pltsPoptop.style.display="";
?? ?pltsPopbot.style.display="none";
?}
?if(MouseX+pltsoffsetX+popWidth>document.body.clientWidth)
?{
??popLeftAdjust=-popWidth-pltsoffsetX*2;
??topleft.style.display="none";
??botleft.style.display="none";
??topright.style.display="";
??botright.style.display="";
?}
?else
?{
??popLeftAdjust=0;
??topleft.style.display="";
??botleft.style.display="";
??topright.style.display="none";
??botright.style.display="none";
?}
?pltsTipLayer.style.left=MouseX+pltsoffsetX+document.body.scrollLeft+popLeftAdjust;
?pltsTipLayer.style.top=MouseY+pltsoffsetY+document.body.scrollTop+popTopAdjust;
? ?return true;
}
pltsinits();