//function toggleBox(szSection, iState) // 1 visible, 0 hidden
function togglebox(szSection, iState) // 1 visible, 0 hidden
{
    var szDivID = szSection + '_showhide';
    var szButtonDivID = szSection + '_leftnav';
    if(document.layers)	   //NN4+
    {
       document.layers[szDivID].visibility = iState ? "show" : "hide";
       document.layers[szButtonDivID].backgroundImage = iState ? 'url(/images/leftnav_' + szSection + '_roll.jpg)' : 'url(/images/leftnav_' + szSection + '_norm.jpg)';
    }
    else if(document.getElementById)	  //gecko(NN6) + IE 5+
    {
        var obj = document.getElementById(szDivID);
        obj.style.visibility = iState ? "visible" : "hidden";
        var obj = document.getElementById(szButtonDivID);
        obj.style.backgroundImage = iState ? 'url(/images/leftnav_' + szSection + '_roll.jpg)' : 'url(/images/leftnav_' + szSection + '_norm.jpg)';
    }
    else if(document.all)	// IE 4
    {
        document.all[szDivID].style.visibility = iState ? "visible" : "hidden";
	document.all[szButtonDivID].style.backgroundImage = iState ? 'url(/images/leftnav_' + szSection + '_roll.jpg)' : 'url(/images/leftnav_' + szSection + '_norm.jpg)';
    }
}
function hide_all()
{
/*	toggleBox('is',0);
	toggleBox('cs',0);
	toggleBox('sd',0);
	toggleBox('it',0);
	toggleBox('ar',0);
*/
	togglebox('is',0);
	togglebox('cs',0);
	togglebox('sd',0);
	togglebox('it',0);
	togglebox('ar',0);
}