JavaScript 实现ALT标签中显示图片

html
head
  script language="javascript"
var tipTimer;
function locateObject(n, d) { //v3.0
var p,i,x; if(!d) d=document; if((p=n.indexOf("？"))0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&id.forms.length;i++) x=d.forms[i][n];for(i=0;!x&&d.layers&&id.layers.length;i++) x=locateObject(n,d.layers[i].document); return x;
}
function hideTooltip(object)
{
if (document.all)
{
locateObject(object).style.visibility="hidden"
locateObject(object).style.left = 1;
locateObject(object).style.top = 1;
return false
}
else if (document.layers)
{
locateObject(object).visibility="hide"
locateObject(object).left = 1;
locateObject(object).top = 1;
return false
}
else
return true
}
function showTooltip(object,e, tipContent, backcolor, bordercolor, textcolor, displaytime)
{
window.clearTimeout(tipTimer)
if (document.all)
{
locateObject(object).style.top=document.body.scrollTop+event.clientY+20
locateObject(object).innerHTML='table style="font-family: Verdana,Tahoma, Arial, Helvetica, sans-serif; font-size: 11px; border: '+bordercolor+'; border-style: solid; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; background-color: '+backcolor+'" width="10" border="0" cellspacing="1" cellpadding="1"trtd nowrapfont style="font-family: Verdana,Tahoma, Arial, Helvetica, sans-serif; font-size: 11px; color: '+textcolor+'"'+unescape(tipContent)+'/font/td/tr/table '
if ((e.x + locateObject(object).clientWidth) (document.body.clientWidth + document.body.scrollLeft))
{
locateObject(object).style.left = (document.body.clientWidth + document.body.scrollLeft) - locateObject(object).clientWidth-10;
}
else
{
locateObject(object).style.left=document.body.scrollLeft+event.clientX
}
locateObject(object).style.visibility="visible"
tipTimer=window.setTimeout("hideTooltip('"+object+"')", displaytime);
return true;
}
else if (document.layers)
{
locateObject(object).document.write('table width="10" border="0" cellspacing="1" cellpadding="1"tr bgcolor="'+bordercolor+'"tdtable width="10" border="0" cellspacing="0" cellpadding="2"tr bgcolor="'+backcolor+'"td nowrapfont style="font-family: Verdana,Tahoma, Arial, Helvetica, sans-serif; font-size: 11px; color: '+textcolor+'"'+unescape(tipContent)+'/font/td/tr/table/td/tr/table')
locateObject(object).document.close()
locateObject(object).top=e.y+20
if ((e.x + locateObject(object).clip.width) (window.pageXOffset + window.innerWidth))
{
locateObject(object).left = window.innerWidth - locateObject(object).clip.width-10;
}
else
{
locateObject(object).left=e.x;
}
locateObject(object).visibility="show"
tipTimer=window.setTimeout("hideTooltip('"+object+"')", displaytime);
return true;
}
else
{
return true;
}
}
/script
  /head
  body
div id="dHTMLToolTip" style="position: absolute; visibility: hidden; width:10; height: 10; z-index: 1000; left: 0; top: 0"/div
span onMouseOver="showTooltip('dHTMLToolTip',event, '文字提示信息部分brimg src=http://feeds2.feedburner.com/~fc/dlstu？bg=99CCFF&fg=2C689B&anim=0br大家好啊。。', '#fffff2','#000000','#000000','20000')" onMouseOut="hideTooltip('dHTMLToolTip')"KeKe's Blog/span
/body
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