<script type="text/javascript">
var visitorName = "Chuck";
var myOldString = "Hello username! I hope you enjoy your stay username.";
var myNewString = myOldString.replace("username", visitorName);

document.write("Old string = " + myOldString);
document.write("<br />New string = " + myNewString);

</script>

Old string = Hello username! I hope you enjoy your stay username.
New string = Hello Chuck! I hope you enjoy your stay username.

<div style="text-align: center; width: 100%;">
<div style="margin: 0 auto; padding: 0; width: 100%;">
<div id="mainDiv" style="padding: 2px 0;">
<textarea cols="21" id="tarea" onfocus="code_check();" rows="10" style="font-size: 12px; height: 80%; width: 92%;"></textarea>
<div style="margin: 0 auto; padding: 5px 0; width: 95%;">
<button onclick="code_convert();" style="margin-right: 5px;" type="button">Konvert</button>
<button onclick="code_clear();" style="margin-left: 5px;" type="button">Hapus</button> </div>
</div>
</div>
</div>
<script>
function code_check(){
var focuscheck=document.getElementById('tarea');if(focuscheck.value.indexOf('Pastekan Disini Kode yang Akan Anda Pasang pada Postingan Blog')>0)focuscheck.value='';}
function code_clear(){
var wtarea=document.getElementById('tarea');wtarea.value='';}
function code_convert(){
var ctarea=document.getElementById('tarea');var toConvert=ctarea.value;
var toConvert=toConvert.replace(/&/g,"&amp;");
var toConvert=toConvert.replace(/'/g,"'");
var toConvert=toConvert.replace(/"/g,"&quot;");
var toConvert=toConvert.replace(/</g,"&lt;");
var toConvert=toConvert.replace(/>/g,"&gt;");
ctarea.value=toConvert;ctarea.focus();ctarea.select();};
var x=document.getElementById('tarea');x.value='\nPastekan Disini Kode yang Akan Anda Pasang pada Postingan Blog\n\nTool ini Meng-konversi Kode sbb:\n < " & \' >\nmenjadi\n &lt; &quot; &amp; ' &gt;\n\nCreated by www.WAHYUPUTRA.web.id';x.rows=gr;
</script>