function Subclass(id, count) { 
    try{
        for(var i=0;i<count;i++){
            if(id==i){
                 if (document.getElementById("c_" + id)!=null){
                    document.getElementById("c_"+id).style.display="block";
                  }  
            } else {
                if (document.getElementById("c_" + i)!=null){
                       document.getElementById("c_"+i).style.display="none";
                 }      
            }
        }
    }catch(err){}
}

function recordetover(id) {
    try {
        for (var i = 0; i < 21; i++) {
            if (i == id) {
                document.getElementById("r" + id).style.display = "none";
                document.getElementById("r_r" + id).style.display = "block";
            } else {
                document.getElementById("r" + i).style.display = "block";
                document.getElementById("r_r" + i).style.display = "none";
            }
        }
    } catch (err) { }
}

function onUpdate() {
    if (document.getElementById("username").value == "") {
        alert("User Name Not Null");
        document.getElementById("username").focus();
        return false;
    }
    if (document.getElementById("email").value == "") {
        alert("E-Mail Not Null");
        document.getElementById("email").focus();
        return false;
    }
    var vemail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;
    if (!vemail.test(document.getElementById("email").value)) {
        alert("Email Error!");
        document.getElementById("email").value = "";
        document.getElementById("email").focus();
        return false;
    }
    return true;
}