// z(ne)viditelneni prvku
function showElement(name1, fields) {
	var obj1 = document.getElementById(name1);
	obj1.style.display = 'block';

	name1=name1+'-tb';
	var obj1 = document.getElementById(name1);
	obj1.className='tab-sel';

	// projdeme vsechny zalozky v poli ktere se maji schovat
	for (var i=0; i<fields.length; i++) {
		field_name=fields[i];
		obj=document.getElementById(field_name);

		if (obj!=null) {
			obj.style.display = 'none';

			name2=field_name+'-tb';
			var obj2 = document.getElementById(name2);
			if (obj2!=null) {
				obj2.className='sel-tab';
			}
		}
	}

}