/**
 * check login form validation  
 * @return
 */
function form_submit()
{
if(document.register.email_address.value=="")
{
alert("please write your email address");
document.register.email_address.focus();
}
else if(document.register.password.value=="")
{
alert("please write your password");
document.register.password.focus();
}
else
document.register.submit();
}
/**
 * reset the login form 
 * @return
 */
function reset_form()
{
document.register.reset();
document.register.email_address.focus();
}