function checkData()
{
    var EmailReg=/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;
    if(document.getElementById("txt_Email").value == "")
    {
        alert("Please fill in your e-mail address.");
        return false;
    }
    else if(!EmailReg.test(document.getElementById("txt_Email").value))
    {
        alert("Your E-Mail Address is valid.");
        return false;
    }
    if(document.getElementById("Txt_Validate").value == "")
    {
        alert("Please fill in the validate code.");
        return false;
    }
}