How to search text and highlight the text that matches in a webpage.

Use the following function and pass the string to be searched in the function as parameter.

var n = 0;
function Findstring(searchstring)
{
  if (document.all)
  {
    var txt = window.document.body.createTextRange();//create a text range i.e all text in webpage

   for (i = 0; i <= n && (found = txt.findText(searchstring)) != false; i++)
   {

     txt.moveStart("character", 1);//move to next
     txt.moveEnd("textedit");//move to end
   }
   if (found)
   {
    txt.moveStart("character", -1);
    txt.findText(searchstring);
    txt.select();//hightlight the text
    txt.scrollIntoView();
    n++;

}
   else

{
  if (n > 0)
   {
    n = 0;
    Findstring(searchstring);

   }
   else
   {
    alert("Sorry, we couldn't find.Try again");

   }

  }

 }
  return false;
}

It will highlight the string if any matched case will be found .It works in IE4+.