function rebuild(){
 var s = "";
 //document.getElementById("verifynumber").innerHTML=s;
   var xoopscaptcha_exp = document.getElementById("xoopscaptcha_exp");
   xoopscaptcha_exp.innerHTML="2 + 7 = ?";
   document.getElementById("XOOPS_TOKEN_REQUEST").value="b9e3f63d1360b50822f78957d90edaee";
 }