js实现表单checkbox的单选，全选

全选&单选

	//<input type="checkbox" name="" class="quan" value="" />全选
	//<input type="checkbox" name="" class="dan" value="" />单选
	//<input type="checkbox" name="" class="dan" value="" />单选
	//<input type="checkbox" name="" class="dan" value="" />单选
	//<input type="checkbox" name="" class="dan" value="" />单选
	//<input type="checkbox" name="" class="quan" value="" />全选
	
	<script src="js/jquery-1.11.3.js" type="text/javascript" charset="utf-8"></script>
	<script type="text/javascript">	
		var $checke_q = $(".quan"); //全选按钮
		var $checke_d = $(".dan"); //单选按钮

		$checke_q.click(function() {
			var that = this;
			$checke_d.each(function() { //所有的单选按钮跟随选中的多选按钮变化
				this.checked = that.checked;
			})
			$checke_q.each(function(){  //所有的多选按钮跟随选中的多选按钮变化
				this.checked=that.checked;
			})
		})
		$checke_d.change(function() {
			let count = 0; //单选 按钮 个数
			$checke_d.each(function() { 
				if(this.checked) {
					count ++;
				}
			})
			if(count == $checke_d.length) {   //当count等于单选按钮的个数时 说明单选按钮全部选中了，此时多选按钮也该被选中
				$checke_q.each(function() {
					this.checked = true;
				})
			} else {
				$checke_q.each(function() {
					this.checked = false;
				})
			}
		})
	</script>