查找页面关键字

提示:请输入关键字后按查找，试试body

1.将下面的代码复制到 <body> 内

/*
Find In Page Script- 
By Mike Hall (MHall75819@aol.com)
Permission granted to Dynamicdrive.com to feature script in archive
For full source code, visit http://dynamicdrive.com
*/

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>