var a = Math.round(Math.random()*10); 
var b = Math.round(Math.random()*10); 


document.write("<p><input type='hidden' name='verifya' value='"+ a +"'><input type='hidden' name='verifyb' value='"+ b +"'> Anti&nbsp;spam: Sum&nbsp;of&nbsp;"+ a + "&nbsp;+&nbsp;" + b + "&nbsp;=&nbsp;?</p></td><td width='181'><input type='text' name='verif' size='24'></td></tr><tr><td>");

function test()
{
var aa = parseInt(document.forms[0].verifya.value);
var bb = parseInt(document.forms[0].verifyb.value);
var cc = parseInt(document.forms[0].verif.value);
var dd = aa + bb;
if(cc != dd){
 alert("recalculate");
return false;
}
else{
document.forms[0].action="send_mail.php";
return true;
}
}