function login()
{
    if(document.login_form.username.value!="" && document.login_form.password.value!="" )
        document.login_form.submit();
    else
        mb_confirm("mosaic:builder", document.getElementById("login_msgFillIn").innerHTML, new Array("OK", ""));
}

function logout()
{
	if(document.mainFrameForm.changed.value==1)
	{
		if(confirm(document.getElementById("login_msgLostChanges").innerHTML))
		{
			document.mainFrameForm.changed.value=0;
			document.login_form.submit();
		}
	}
	else
		document.login_form.submit();
}