<script type="text/javascript">
    $(document).ready(function(){   
        $("#baslik").live("keyup", function() {
     
            str = $(this).val();
            str =replaceSpecialChars(str);
            str=str.toLowerCase();
            str =str.replace( /\s\s+/g, ' ' ).replace(/[^a-z0-9\s]/gi, '').replace(/[^\w]/ig, "-");
 
    
            function replaceSpecialChars(str) {
                var specialChars = [["ş", "s"], ["ğ", "g"], ["ü", "u"], ["ı", "i"],["_", "-"],
                    ["ö", "o"], ["Ş", "S"], ["Ğ", "G"], ["Ç", "C"], ["ç", "c"],
                    ["Ü", "U"], ["İ", "I"], ["Ö", "O"], ["ş", "s"]];
 
                for (var i = 0; i < specialChars.length; i++) {
                    str = str.replace(eval("/" + specialChars[i][0] + "/ig"), specialChars[i][1]);
                }
                return str;
            }
            $("#sef").val(str);
        });   
    });
 
</script>

<yazi><strong>Başlık</strong></yazi>
            <br/>
            <input id="baslik" type="text" value="" style="width: 699px; height: 40px;" class="input-text-panel" name="baslik"/>
            <br/>
            <yazi><strong>Sef link Yapısı</strong></yazi>
            <br/>
            <input id="sef" type="text" value="" style="width: 699px; height: 40px;" class="input-text-panel" name="sef"/>