Search box to find texts on the pages?

Search box to find texts on the pages?
<!-- This Script is from www.studfuture.forumotion.com, Coded by: Gnanaprakash-->
<SCRIPT language=JavaScript>
var NS4 = (document.layers);
var IE4 = (document.all);
var win = window;
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("Not found.");
}
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("Sorry, we couldn't find.Try again");
}
}
return false;
}
</SCRIPT>

<FORM name=search onsubmit="return findInPage(this.string.value);">
<P align=center><FONT size=3>
<INPUT
style="BORDER-RIGHT: #666666 1px solid; BORDER-TOP: #666666 1px solid; FONT-SIZE: 8pt; BORDER-LEFT: #666666 1px solid; BORDER-BOTTOM: #666666 1px solid"
onchange="n = 0;" size=16 name=string></FONT><BR><INPUT style="BORDER-RIGHT: #ffffff 1px solid; BORDER-TOP: #ffffff 1px solid; FONT-SIZE: 8pt; BORDER-LEFT: #ffffff 1px solid; BORDER-BOTTOM: #ffffff 1px solid; FONT-FAMILY: Tahoma; BACKGROUND-COLOR: #aaaaaa" type=submit value=Search in page ><center><font size=2pt;><font family=Times New Roman;><b>

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