function openHiddenMenu (block){
					arr=block.parentNode.getElementsByTagName('ul');
					if (arr[0].style.display=='none'){
						arr[0].style.display='block';
						block.src="img/closeBlock.gif";
						block.title="скрыть подменю";
					}
					else {
						arr[0].style.display='none';
						block.src="img/openBlock.gif";
						block.title="открыть подменю";
					}
				}
	
	function unChecked(){
	   arr=document.body.getElementsByTagName('input');
	   for(i=0;i<arr.length;i++){
	   arr[i].checked	= false	
	   }
	}