点击图片切换，再次点击恢复成原来的图片

点击图片切换，再次点击恢复成原来的图片

	<style>
		#content {
			width: 60px;
			height: 60px;
			border-radius: 50%;
			overflow: hidden;
		}
		#photo {
			width: 100%;
			height: 100%;
		}
		</style>
         <div id="content">
			<img id="photo" src="./qiye.png" alt="" />
		</div>
		<script type="text/javascript">
			var flag = true;
			content.onclick = function() {
				if(flag == true) {
					photo.setAttribute('src', "./1.png");
					flag = false;
				} else {

					photo.setAttribute('src', "./qiye.png");
					flag = true;
				}
			}
			</script>