attachEvt(window, "load", function() { aanmelden_init() });

function aanmelden_init()
{
	var lvCheckBox = getEl("cbAgreed");
	var lvTextArea = getEl("tbAgreement");

	if (lvCheckBox != null && lvTextArea != null)
	{
		attachEvt(lvTextArea, "scroll", function() { aanmelden_checkScrolled(lvTextArea, lvCheckBox); });
		lvCheckBox.disabled = true;
	}
}

function aanmelden_checkScrolled(pvTextArea, pvCheckBox)
{
    if (pvCheckBox.disabled && pvTextArea.scrollTop + pvTextArea.offsetHeight > pvTextArea.scrollHeight)
	{
		pvCheckBox.disabled = false;
	}
}