function set_visibility(div_id, value)
{
	document.getElementById(div_id).style.visibility = value;
	if (value == 'visible')
		document.getElementById('combo_icon').src='/sysimages/up.gif';
	else
		document.getElementById('combo_icon').src='/sysimages/down.gif';
};

function toogle(div_id)
{
	if (document.getElementById(div_id).style.visibility == 'hidden')
		set_visibility(div_id, 'visible');
	else
		set_visibility(div_id, 'hidden');
};

function showCOMBO(selectbox_id)
{
	var objSELECTBOX = document.getElementById(selectbox_id);
	//objSELECTBOX.style.display = 'block';
	
	var objSELECTBOX_BUTTON = document.getElementById('combo_button');
	objSELECTBOX_BUTTON.style.visibility = 'visible';
	
}

function alt_createCOMBO(selectbox_id)
{
	var objSELECTBOX = document.getElementById('lander')
	if (objSELECTBOX.childNodes.length > 0)
	{
		var objNEWBOX = document.createElement('div');
		objNEWBOX.setAttribute('class', 'combo');
		
		var objNEWBOX_BUTTON = document.createElement('div');
		objNEWBOX_BUTTON.setAttribute('class', 'button');
		objNEWBOX_BUTTON.innerHTML = '<a onclick="toogle(\'combo_list\');" onfocus="set_visibility(\'combo_list\', \'visible\')" onblur="set_visibility(\'combo_list\', \'hidden\')"><img src="down.gif" id="combo_icon" alt="" /></a>';
		
		var objNEWBOX_BUTTON = document.createElement('div');
		objNEWBOX_BUTTON.setAttribute('id', 'combo_list');
		objNEWBOX_BUTTON.setAttribute('class', 'list');
		objNEWBOX_BUTTON.setAttribute('style', 'visibility: hidden;');
		
		var objSELECTBOX_OPTGROUPS = objSELECTBOX.getElementsByTagName('optgroup');
		for (var i=0; i<objSELECTBOX_OPTGROUPS.length; i++)
		{
		

		
			alert(objSELECTBOX_OPTGROUPS.item(i).getAttribute('img'));
			alert(objSELECTBOX_OPTGROUPS.item(i).getAttribute('label'));
			alert(objSELECTBOX_OPTGROUPS.item(i).innerHTML);
		}
		
		
		
		objNEWBOX.appendChild(objNEWBOX_BUTTON);
		
		document.getElementById('landerauswahl').appendChild(objNEWBOX);
		
	}
};