function dropdown(name) {
	var list = document.getElementById('lt_'+name);
	if (list.style.display != 'block') {
		list.style.display = 'block';
		var t = document.getElementById('t_'+name);
		list.style.width = t.offsetWidth;
		list.style.left = t.offsetLeft +  t.offsetParent.offsetLeft + 
			t.offsetParent.offsetParent.offsetLeft +
			t.offsetParent.offsetParent.offsetParent.offsetLeft;
		list.style.top = t.offsetTop + t.offsetHeight +
			t.offsetParent.offsetTop +
			t.offsetParent.offsetParent.offsetTop +
			t.offsetParent.offsetParent.offsetParent.offsetTop;
	} else {
		list.style.display = 'none';
	}
}

function rollup(name) {
	var list = document.getElementById('lt_'+name);	
    list.style.display = 'none';
}

function change(name) {
	var list = document.getElementById('lt_'+name);	
	var v = document.getElementById('cv_'+name);    
	v.value = list.options[list.selectedIndex].value;
	var t = document.getElementById('ct_'+name);    
	if (t) { t.innerHTML = list.options[list.selectedIndex].innerHTML; }
	rollup(name);
}