var NS4 = (document.layers);  
var IE4 = (document.all);
// window to search.
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("抱谦!我找不到你要的内容.");
  }
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("抱谦!我找不到你要的内容.");
    }
  }

  return false;
}