function getById(id)
{
	var it;
	if(document.getElementById)
		it=document.getElementById(id);
	else if (document.all)
		it=document.all[id];
	else if (document.layers)
		it=document.layers[id];
	else
		it=null;
	return it;	
}
function checkPageType()
{
	if(getById('page_category').selectedIndex==0)
	{
		getById('articleDiv').style.display='none';
	}
	else
	{
		getById('articleDiv').style.display='block';
	}
}