code search engine within your web page

code search engine within your web page

<script language="JavaScript">


var NS4 = (document.layers); // Which browser?
var IE4 = (document.all);

var win = window; // window to search.
var n= 0;

function findInPage(str) {

  var txt, i, found;

  if (str == "")
 return false;

  // Find next occurance of the given string on the page, wrap around to the
  // start of the page if necessary.

  if (NS4) {

 // Look for match starting at the current point. If not found, rewind
 // back to the first match.

 if (!win.find(str))
while(win.find(str, false, true))
  n++;
 else
n++;

 // If not found in either direction, give message.

 if (n == 0)
alert("Not found.");
  }

  if (IE4) {
 txt = win.document.body.createTextRange();

 // Find the nth match from the top of the page.

 for (i = 0; i <= n && (found = txt.findText(str)) != false; i++) {
txt.moveStart("character", 1);
txt.moveEnd("textedit");
 }

 // If found, mark it and scroll it into view.

 if (found) {
txt.moveStart("character", -1);
txt.findText(str);
txt.select();
txt.scrollIntoView();
n++;
 }

 // Otherwise, start over at the top of the page and find first match.

 else {
if (n > 0) {
  n = 0;
  findInPage(str);
}

// Not found anywhere, give message.

else
  alert("Not found.");
 }
  }

  return false;
}

</script>

<form name="search" onSubmit="return findInPage(this.string.value);">
<font size=3><input name="string" type="text" size=15 onChange="n = 0;"></font>
<input type="submit" value="Find">
</form>