function clear_tf(layer_name)
{
	if(document.getElementById(layer_name).value == ' Suche/Webcode')
	{
		document.getElementById(layer_name).value= '';
	}
}		
	
function fill_tf(layer_name)
{
	if(document.getElementById(layer_name).value == '')
	{
		document.getElementById(layer_name).value= ' Suche/Webcode';
	}
}