<script src="component/layui/layui.js"></script>
								 并
								<script src="component/pear/pear.js"></script>
							

								layui.use(['encrypt'], function() {
									var encrypt = layui.encrypt;
								
								    encrypt.md5( str );
									
								    encrypt.sha1( str );
									
								    encrypt.sha256( str );
								})