function Modal_ShowModal(elementId)
{
	var modalMask = document.getElementById(elementId);
	modalMask.style.visibility = 'visible';
	
	modalMask.style.width = Common_GetRealClientWidth() + 'px';
	modalMask.style.height = Common_GetRealClientHeight() + 'px';
}

function Modal_HideModal(elementId)
{
	var modalMask = document.getElementById(elementId);
	modalMask.style.visibility = 'hidden';
}