Code:

<div class="content">
<meta name="GENERATOR" content="Microsoft FrontPage 5.0"><meta name="ProgId" content="FrontPage.Editor.Document"><meta http-equiv="Content-Type" content=
"text/html; charset=windows-1252">
<style type="text/css">
}

BODY {

SCROLLBAR-FACE-COLOR: #1c1c1c; SCROLLBAR-HIGHLIGHT-COLOR: #666666; SCROLLBAR-SHADOW-COLOR: #666666; SCROLLBAR-3DLIGHT-COLOR: #000000; SCROLLBAR-ARROW-COLOR: #f2f5ff; SCROLLBAR-TRACK-COLOR: #262d34;

<
</style>
<center><img src=
"http://i1080.photobucket.com/albums/j331/trantienphuong/dayne.gif"
border="0"><br>
<div class="content">
<div style=
"font-family: Verdana,Geneva,Lucida,'Lucida Grande'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none; margin-bottom: 3px;">
<input value="VÀO PHÒNG CHAT" style=
"background:#00BFFF; margin: 0px; padding: 0px; width: 165px; font-size: 12px;"
onclick=
"if (this.parentNode.parentNode.getElementsByTagName('div')[1].getElementsByTagName ('div')[0].style.display != '') { this.parentNode.parentNode.getElementsByTagName('div') [1].getElementsByTagName('div')[0].style.display = ''; this.innerText = ''; this.value = 'HẸN GẶP LẠI'; } else { this.parentNode.parentNode.getElementsByTagName('div') [1].getElementsByTagName('div')[0].style.display = 'none'; this.innerText = ''; this.value = 'VÀO PHÒNG CHAT'; }"
type="button"></div>
<div style=
"border: 0px inset ; margin: 0px; padding: 0px; min-height: 10px;">
<div style="display: none;">
<!-- BEGIN CBOX - www.cbox.ws - v001 -->
<div id="cboxdiv" style="text-align: center; line-height: 0">
<div><iframe frameborder="0" width="200" height="263" src="http://www7.cbox.ws/box/?boxid=773860&amp;boxtag=r8w4vw&amp;sec=main" marginheight="2" marginwidth="2" scrolling="auto" allowtransparency="yes" name="cboxmain7-773860" style="border:#FFFFFF 1px solid;" id="cboxmain7-773860"></iframe></div>
<div><iframe frameborder="0" width="200" height="117" src="http://www7.cbox.ws/box/?boxid=773860&amp;boxtag=r8w4vw&amp;sec=form" marginheight="2" marginwidth="2" scrolling="no" allowtransparency="yes" name="cboxform7-773860" style="border:#FFFFFF 1px solid;border-top:0px" id="cboxform7-773860"></iframe></div>
</div>
<!-- END CBOX -->

Thay đoạn code màu đỏ bằng code hộp chat cua bạn (Vào http://www.cbox.ws/ để tạo)