 <p>Yes you can change it. if you call VBscript function within Javascript.</p> <p>Here is simple example</p> <pre><code>&lt;script&gt; function alert_confirm(){ customMsgBox("This is my title","how are you?",64,0,0,0); } &lt;/script&gt; &lt;script language="VBScript"&gt; Function customMsgBox(tit,mess,icon,buts,defs,mode) butVal = icon + buts + defs + mode customMsgBox= MsgBox(mess,butVal,tit) End Function &lt;/script&gt; &lt;html&gt; &lt;body&gt; &lt;a href="javascript:alert_confirm()"&gt;Alert&lt;/a&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>