Hi all!

I have trouble getting this work for a long time and I never found a solution. Please help me so i can get to the next step, very tired of this problem.
I have a button which when i click on it goes to a function which shows a Div, but when i add an Ajax or FileSystemObject syntax in the same function, the show/hide doesnt work anymore.
Example:
Code:
<script>
function showhide() {
document.getElementById("divobject").style.visibility="visible";
xmlhttp.open("POST","example2.php",true);
xmlhttp.onreadystatechange  = handleServerResponse;
xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xmlhttp.send("email_box="+ email_box.value +"&password_box="+ password_box.value +"&provider_box="+provider_box.value);
}
</script>
When i run this code above, the Divobject never actually appears.

What is the problem that is causing it and what is the solution?
Please help!