// Funktionen zur Darstellung der ZL - Tabellen

function zl_changetbl() {
	tbl = document.getElementById('labtbl_'+this.id.substr(8));
	if (tbl){
		if (tbl.style.display == 'block') tbl.style.display = 'none';
		else                              tbl.style.display = 'block';
	}
}

function zl_setlink(lnkname){
	lnk = document.getElementById(lnkname);
	if(lnk) {
		lnk.onclick = zl_changetbl;
	}
}

function zl_inittbls() {
	tbls = document.getElementsByTagName("table");
	num = 0;
	for (i=tbls.length; i--;) if (tbls[i].id.substr(0,7) == 'labtbl_') num++;
	if (num > 1) {
		for (i=tbls.length; i--;) {
			if (tbls[i].id.substr(0,7) == 'labtbl_') {
				tbls[i].style.display = 'none';
				zl_setlink("lablink_"+tbls[i].id.substr(7));
			}
		}
	}
}