function deleteRandomBanners(title, anzahl)
{
	var list = document.getElementById("id_" + title);
						
	var liNodeIndexes = new Array();
	j=0;
	for(var i=0; i < list.childNodes.length; i++)
	{
		var childNode = list.childNodes[i];
		
		if(childNode.nodeType == 1)
		{
			liNodeIndexes[j] = i;
			j++;
		}
	}

	while(liNodeIndexes.length > anzahl)
	{	
		var indexOfIndexOfNodeToDelete = parseInt(Math.random() * liNodeIndexes.length);
		var nodeToDelete = list.childNodes[liNodeIndexes[indexOfIndexOfNodeToDelete]];

		list.removeChild(nodeToDelete);
		
		liNodeIndexes = new Array();
		j=0;
		for(var i=0; i < list.childNodes.length; i++)
		{
			var childNode = list.childNodes[i];
				
			if(childNode.nodeType == 1)
			{
				liNodeIndexes[j] = i;
				j++;
			}
		}
	}
}