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)