function checkRegEmailCount(){
    var email = document.getElementById("reg_email").value;
    var pattern = new RegExp(/[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]+)/);
    var url = "joinrpc.php";
    var postStr = 'format=json&type=lookup_count&email='+email;
    if(!pattern.test(email))
        return false;
     
    new Ajax(url,{data:postStr, onComplete:processReverseLookupCount, onFailure:function(){}}).request();
}

function processReverseLookupCount(user_array){
    if(user_array < 1){
        document.getElementById('reverseLookup').style.display="none";
        return false;
    }
    
    html = tString_YouHaveXFriendsOnFriendster;
    html = html.replace(/%1/ig, user_array);
    document.getElementById('reverseLookup').style.display="block";
    document.getElementById('reverseLookup').innerHTML = html;
}