function showPopup(num)

{


	hidePopup();
	document.body.style.overflow='hidden';
	document.body.scrollTop=0;

	document.getElementById('mask').style.display='block';

	document.getElementById('popup'+num).style.display='block';

}



function hidePopup()

{
	document.body.style.overflow='auto';


	document.getElementById('mask').style.display='none';

	

	var i=0;

	while(document.getElementById('popup'+i)!=null)

	{

		document.getElementById('popup'+i).style.display='none';

		i++;

	}

}