function checkLoginForm(frmName)
{	
	var D_frmName
	if (frmName == "loginform")
	{
		D_frmName = document.loginform
	}
	else
	{
		D_frmName = document.loginform_by_songsl
	}
	if(trim(D_frmName.userID.value)=="")
	{
		alert(LoginIDMessage)
		D_frmName.userID.focus();
		return;
	}

	if(trim(D_frmName.userPassword.value)=="")
	{
		alert(LoginPasswordMessage)
		D_frmName.userPassword.focus();
		return;
	}
	
	D_frmName.submit()
}