var ie=document.all?1:0
var ns6=document.getElementById&&!document.all?1:0
var opera=window.opera?1:0


function hideAll()
{
	hideFolder('sub_01');
	hideFolder('sub_02');
	hideFolder('sub_03');
	hideFolder('sub_04');
	hideFolder('sub_05');
	hideFolder('sub_06');
	hideFolder('sub_07');
}
function hideFolder(subobj) 
{
	var folder=''
	if (ie||ns6||opera) {
		folder=ns6?document.getElementById(subobj).style:document.all(subobj).style;
		folder.display="none";
	}
}
function showFolder(subobj) {
	var folder=''
	if (ie||ns6||opera) {
		folder=ns6?document.getElementById(subobj).style:document.all(subobj).style;
		hideAll();
		if(folder.display == "none")
		{
			folder.display="";
		}else
		{
			folder.display="none";
		}
	}
}