一个完整的类似ctrl+f的功能

<style type=text/css>
BODY {
FONT-FAMILY: "宋体","Arial","Times New Roman"; FONT-SIZE: 12px; LETTER-SPACING: 1pt; LINE-HEIGHT: 22px; MARGIN-LEFT: 5pt; MARGIN-TOP: 5pt
}
#scontentmain {
BACKGROUND-IMAGE: url(http://www.jzzy.com/photo/pc0415.gif); HEIGHT: 30px; POSITION: absolute; TOP: 28px; WIDTH: 228px
}
#scontentbar {
BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid; BORDER-RIGHT: black 1px solid; BORDER-TOP: black 1px solid; CURSOR: hand; HEIGHT: 15px; PADDING-BOTTOM: 1px; PADDING-LEFT: 1px; PADDING-RIGHT: 1px; PADDING-TOP: 1px; POSITION: absolute; TOP: 5px; WIDTH: 100%
}
#scontentsub {
POSITION: absolute; TOP: 28px; WIDTH: 100%
}
A.a1:hover {
BORDER-BOTTOM: #4a8ff2 1px solid; BORDER-LEFT: #4a8ff2 1px solid; BORDER-RIGHT: #4a8ff2 1px solid; BORDER-TOP: #4a8ff2 1px solid; LINE-HEIGHT: 13pt; WIDTH: 83px; 12px;: 1869FE; align: center
}
A.a1:link {
COLOR: #ffffff; TEXT-DECORATION: none; 12px;align: center
}
TD {
FONT-SIZE: 12px
}
.pos {
POSITION: relative
}
</style>
<SCRIPT language=JavaScript>
/*** DownLoad.PcHome.net Online Search Engine ***/
/*** Author:Yoo Lee ***/
/*** Version:1.0 2001/06/04 ***/
var dragapproved=false
var zcor,xcor,ycor
function drag_onclick() {
if (search1.drag.checked == true ) dragapproved=false
else dragapproved=true
}
function movescontentmain(){
if (event.button==1&&dragapproved&&search1.drag.checked == true){
zcor.style.pixelLeft=tempvar1+event.clientX-xcor
zcor.style.pixelTop=tempvar2+event.clientY-ycor
leftpos=document.all.scontentmain.style.pixelLeft-document.body.scrollLeft
toppos=document.all.scontentmain.style.pixelTop-document.body.scrollTop
return false
}
}
function dragscontentmain(){
if (!document.all)
return
if (event.srcElement.id=="scontentbar"){
dragapproved=true
zcor=scontentmain
tempvar1=zcor.style.pixelLeft
tempvar2=zcor.style.pixelTop
xcor=event.clientX
ycor=event.clientY
document.onmousemove=movescontentmain
}
}
document.onmousedown=dragscontentmain
document.onmouseup=new Function("dragapproved=false")
function aa(e)
{
if (e==0) alert("\n-　　= 页面字符搜索引擎 1.0 测试版 = \n\n-　　 电脑之家 版权所有\n\n- 重写了部分代码\n- 修正鼠标拖动跳跃的bug，\n- 保留选择可否拖动……\n\n- 其他功能正在测试中！\n\n");
return;
}
function cose()
{
if(confirm("即将关闭此窗口，如确认请按确定！\n\n如要重开此窗口请刷新页面。"))
scontentmain.style.display=@#none@#
else
scontentmain.style.display=@#@#
}
//screen.width,screen.height
document.write(@#<div id="scontentmain"><form name="search1" onSubmit="return findInPage(this.Word.value);"><div id="scontentbar"> <img src="http://www.jzzy.com/photo/alt0415.gif" alt="帮助" border="0" onClick="aa(0)"><img src="http://www.jzzy.com/photo/usr0415.gif" usemap="#Map" border="0"><map name="Map"><area shape="rect" coords="20,0,40,20" alt="最大化" onclick="offdisplay()"><area shape="rect" coords="0,0,20,20" alt="最小化" onclick="ondisplay()"><area shape="rect" shape="rect" coords="34,0,60,19" alt="关闭" onclick="cose()"></map></div><div id="scontentsub"" style="visibility: show"><table width="228" border="1" cellpadding="2" cellspacing="0" bordercolorlight="#000000" bordercolordark="#FFFFFF" bgcolor="#0099CC" class=font1><tr bgcolor="#2D96FF"><td height="2" colspan="2" align="center"><input type="text" name="Word" size="30" onChange="n = 0;" onFocus=window.document.search1.Word.value="" style="background-image: url(http://www.jzzy.com/./photo/address0415.gif)" ></td></tr><tr bgcolor="#CCCCCC"><td width="222"> <input type="checkbox" name="drag" value="搜索" LANGUAGE=javascript onclick="return drag_onclick()">可用鼠标拖动窗口 <a href="#top"><img src="http://www.jzzy.com/photo/top0415.gif" alt="GO TOP" border="0" valign="center"></a></td><td width="61" align="center"><input type="submit" name="Submit" value="搜索"></td></tr></form></table></div></DIV>@#);

/******************** do Floating Window@#s Mouse Action ********************/

var w=document.body.clientWidth-450
var h=190
w+=document.body.scrollLeft
h+=document.body.scrollTop

var leftpos=w
var toppos=h
scontentmain.style.left=w
scontentmain.style.top=h

function ondisplay(){
if (scontentsub.style.display==@#@#)
scontentsub.style.display=@#none@#
else
scontentsub.style.display==@#@#
}

function offdisplay(){
if (scontentsub.style.display==@#none@#)
scontentsub.style.display=@#@#
else
scontentsub.style.display==@#none@#
}

function staticize(){
w2=document.body.scrollLeft+leftpos
h2=document.body.scrollTop+toppos
scontentmain.style.left=w2
scontentmain.style.top=h2
}
window.onscroll=staticize

function GetWord()
{
var tr
// event.cancelBubble = true
// event.returnValue=false
}
function FindWord(w)
{
for (var i=0;i<WordList.options.length;i++)
if (WordList.options[i].text==w)
{
WordList.options[i].selected=true
Output.value=WordExpln[i]
RESULT.style.visibility="visible"
return true
}
return false
}
/******************** Main Part ********************/
var canDrag=0,canGetWord=0
var oldtop=0,oldscrolltop=0
var WordExpln=new Array()
var G_xmlHTTP
document.onmousemove = GetWord

var NS4 = (document.layers);
var IE4 = (document.all);

var win = this;
var n = 0;

function findInPage(str)
{
var txt, i, found;
if (str == "")
return false;
if (NS4)
{
if (!win.find(str))
while(win.find(str, false, true))
n++;
else
n++;
if (n == 0) alert(str + " ... 您要找的文字不存在。\n \n请试着输入页面中的关键字再次查找！\n \n 并且请注意，不要把“？”或“：”也输入查找！！！");
}

if (IE4)
{
txt = win.document.body.createTextRange();
for (i = 0; i <= n && (found = txt.findText(str)) != false; i++)
{
txt.moveStart("character", 1);
txt.moveEnd("textedit");
}
if (found)
{
txt.moveStart("character", -1);
txt.findText(str);
txt.select();
txt.scrollIntoView();
n++; }
else
{
if (n > 0)
{
n = 0;
findInPage(str);
}
else
alert(str + "... 您要找的文字不存在。\n \n请试着输入页面中的关键字再次查找！\n \n 并且请注意，不要把“？”或“：”也输入查找！！！");
}
}
return false;
}

self.onError=null;
currentX = currentY = 0;
whichIt = null;
lastScrollX = 0; lastScrollY = 0;
NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;
</SCRIPT>

原文转自：http://www.ltesting.net