html checkbox全选或者全不选

/* 全选或全不选 */
function CheckedAllOrNo() {
	var arr = $(':checkbox');
	for (var i = 1; i < arr.length; i++) {
		arr[i].checked = arr[0].checked;
	}
}	

 实现checked单选

$(":checkbox").click(function(){
	$(":checkbox").each(function() {
		this.checked = false;
	});
	this.checked = true;
});