Search box to find text on your web page

This Code gives you a text box and if the user wants to search for anything they just need to put their keywords in the box and this code immediately finds the keyword that the user is looking for

<!-- This Script is Coded by: Muhammad Shahroze-->
<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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