<meta charset="utf-8">

<input type="text" id="str">

<input type="button" value="찾기" onclick="findStr()">

<div>

This feature is non-standard and is not on a standards track. 
Do not use it on production sites facing the Web: it will not work for every user. 
There may also be large incompatibilities between implementations and the behavior may change in the future.

</div>

<script type="text/javascript">

function findStr() {

    var n = 0;

    var str = document.getElementById("str").value;

    if(navigator.userAgent.indexOf("rv:11") > -1) {

        var f, contents = document.body.createTextRange();

        for(var i = 0; i <= n && (f = contents.findText(str)) != false; i++) {

            contents.moveStart('character');

            contents.moveEnd('textedit');

        }

        if(f) {

            contents.moveStart('character', -1);

            contents.findText(str);

            contents.select();

            n++;

        }

    } else {

        window.find(str);

    }

}

</script>