// Webtip.cz - DHTML knihovna
// verze 0.5

function objGet(x) {
	if (typeof x != 'string') return x;
	else if (Boolean(document.getElementById)) return document.getElementById(x);
	else if (Boolean(document.all)) return eval('document.all.'+x);
	else return null;
}

function objSetStyle (obj,prop,val) {
	var o = objGet(obj);
	if (o && o.style) {
		eval ('o.style.'+prop+'="'+val+'"');
		return true;
		}
	else return false;
	}

function objShow (obj,on) {
	return objSetStyle(obj,'visibility',(on) ? 'visible':'hidden');
	}

function objDisplay (obj,on,type) {
	if (on && !type) type = 'block';
	return objSetStyle(obj,'display',(on) ? type:'none');
	}

// Ceske ekvivalenty funkci:

var objNajdi = objGet;
var objNastavStyl = objSetStyle;
var objZobraz = objShow;

// DHTML CATALOG ---------------------------------------------------------------------------------------------------
function switchCell(n) {
	for(i=0;i<navcell.length;i++){
		navcell[i].className="tab-off";
		tb[i].style.display="none";
	}
	navcell[n].className="tab-on";
	tb[n].style.display="block";
	//tb_content.height=screen.availHeight-tb_header.clientHeight-tb_navbar.clientHeight-tb_footer.clientHeight-64;
}

function switchMenu(n) {
	//for(i=0;i<navitem.length;i++)
	
	if (navitem[n].className=="menu-item-on"){
			
			navitem[n].className="menu-item-off";
			submenu[n].style.display="none";
			image_menu[n].src="images/arrow_off.gif";
		} else {

		for(i=0;i<navitem.length;i++){
			navitem[i].className="menu-item-off";
			submenu[i].style.display="none";
			image_menu[i].src="images/arrow_off.gif";
		}
		navitem[n].className="menu-item-on";
		submenu[n].style.display="block";
		image_menu[n].src="images/arrow_on.gif";
		}
		
		
}

function switchDescriptionOn(n) {
	cat_description[n].style.display="block";
}

function switchDescriptionOff(n) {
	cat_description[n].style.display="none";
}