点击文字显示，点击文字隐藏（1）-阿里云开发者社区

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>点击文字展开，再次点击隐藏</title>
<style type="text/css">
.detail{
    width:400px;
    line-height:20px;
    padding:10px;
    border-bottom:1px dashed #ccc;
    font-size:12px;
    text-indent:25px;
}
.detail .all{
    display:none;
}
.detail .more{
    text-decoration:none;
    color:#0066CC;
    cursor:pointer;
}
</style>
<!-- <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script> -->   <!-- 这是线上的js -->
<script src="show.js"></script>
<script>
/*!
 * jQuery JavaScript Library v1.11.1
 * http://jquery.com/
 *
 * Includes Sizzle.js
 * http://sizzlejs.com/
 *
 * Copyright 2005, 2014 jQuery Foundation, Inc. and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2014-05-01T17:42Z
 */
(function( global, factory ) {
  if ( typeof module === "object" && typeof module.exports === "object" ) {
    // For CommonJS and CommonJS-like environments where a proper window is present,
    // execute the factory and get jQuery
    // For environments that do not inherently posses a window with a document
    // (such as Node.js), expose a jQuery-making factory as module.exports
    // This accentuates the need for the creation of a real window
    // e.g. var jQuery = require("jquery")(window);
    // See ticket #14549 for more info
    module.exports = global.document ?
      factory( global, true ) :
      function( w ) {
        if ( !w.document ) {
          throw new Error( "jQuery requires a window with a document" );
        }
        return factory( w );
      };
  } else {
    factory( global );
  }
// Pass this if window is not defined yet
}(typeof window !== "undefined" ? window : this, function( window, noGlobal ) {
// Can't do this because several apps including ASP.NET trace
// the stack via arguments.caller.callee and Firefox dies if
// you try to trace through "use strict" call chains. (#13335)
// Support: Firefox 18+
//
var deletedIds = [];
var slice = deletedIds.slice;
var concat = deletedIds.concat;
var push = deletedIds.push;
var indexOf = deletedIds.indexOf;
var class2type = {};
var toString = class2type.toString;
var hasOwn = class2type.hasOwnProperty;
var support = {};
var
  version = "1.11.1",
  // Define a local copy of jQuery
  jQuery = function( selector, context ) {
    // The jQuery object is actually just the init constructor 'enhanced'
    // Need init if jQuery is called (just allow error to be thrown if not included)
    return new jQuery.fn.init( selector, context );
  },
  // Support: Android<4.1, IE<9
  // Make sure we trim BOM and NBSP
  rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,
  // Matches dashed string for camelizing
  rmsPrefix = /^-ms-/,
  rdashAlpha = /-([\da-z])/gi,
  // Used by jQuery.camelCase as callback to replace()
  fcamelCase = function( all, letter ) {
    return letter.toUpperCase();
  };
jQuery.fn = jQuery.prototype = {
  // The current version of jQuery being used
  jquery: version,
  constructor: jQuery,
  // Start with an empty selector
  selector: "",
  // The default length of a jQuery object is 0
  length: 0,
  toArray: function() {
    return slice.call( this );
  },
  // Get the Nth element in the matched element set OR
  // Get the whole matched element set as a clean array
  get: function( num ) {
    return num != null ?
      // Return just the one element from the set
      ( num < 0 ? this[ num + this.length ] : this[ num ] ) :
      // Return all the elements in a clean array
      slice.call( this );
  },
  // Take an array of elements and push it onto the stack
  // (returning the new matched element set)
  pushStack: function( elems ) {
    // Build a new jQuery matched element set
    var ret = jQuery.merge( this.constructor(), elems );
    // Add the old object onto the stack (as a reference)
    ret.prevObject = this;
    ret.context = this.context;
    // Return the newly-formed element set
    return ret;
  },
  // Execute a callback for every element in the matched set.
  // (You can seed the arguments with an array of args, but this is
  // only used internally.)
  each: function( callback, args ) {
    return jQuery.each( this, callback, args );
  },
  map: function( callback ) {
    return this.pushStack( jQuery.map(this, function( elem, i ) {
      return callback.call( elem, i, elem );
    }));
  },
  slice: function() {
    return this.pushStack( slice.apply( this, arguments ) );
  },
  first: function() {
    return this.eq( 0 );
  },
  last: function() {
    return this.eq( -1 );
  },
  eq: function( i ) {
    var len = this.length,
      j = +i + ( i < 0 ? len : 0 );
    return this.pushStack( j >= 0 && j < len ? [ this[j] ] : [] );
  },
  end: function() {
    return this.prevObject || this.constructor(null);
  },
  // For internal use only.
  // Behaves like an Array's method, not like a jQuery method.
  push: push,
  sort: deletedIds.sort,
  splice: deletedIds.splice
};
jQuery.extend = jQuery.fn.extend = function() {
  var src, copyIsArray, copy, name, options, clone,
    target = arguments[0] || {},
    i = 1,
    length = arguments.length,
    deep = false;
  // Handle a deep copy situation
  if ( typeof target === "boolean" ) {
    deep = target;
    // skip the boolean and the target
    target = arguments[ i ] || {};
    i++;
  }
  // Handle case when target is a string or something (possible in deep copy)
  if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
    target = {};
  }
  // extend jQuery itself if only one argument is passed
  if ( i === length ) {
    target = this;
    i--;
  }
  for ( ; i < length; i++ ) {
    // Only deal with non-null/undefined values
    if ( (options = arguments[ i ]) != null ) {
      // Extend the base object
      for ( name in options ) {
        src = target[ name ];
        copy = options[ name ];
        // Prevent never-ending loop
        if ( target === copy ) {
          continue;
        }
        // Recurse if we're merging plain objects or arrays
        if ( deep && copy && ( jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)) ) ) {
          if ( copyIsArray ) {
            copyIsArray = false;
            clone = src && jQuery.isArray(src) ? src : [];
          } else {
            clone = src && jQuery.isPlainObject(src) ? src : {};
          }
          // Never move original objects, clone them
          target[ name ] = jQuery.extend( deep, clone, copy );
        // Don't bring in undefined values
        } else if ( copy !== undefined ) {
          target[ name ] = copy;
        }
      }
    }
  }
  // Return the modified object
  return target;
};
jQuery.extend({
  // Unique for each copy of jQuery on the page
  expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),
  // Assume jQuery is ready without the ready module
  isReady: true,
  error: function( msg ) {
    throw new Error( msg );
  },
  noop: function() {},
  // See test/unit/core.js for details concerning isFunction.
  // Since version 1.3, DOM methods and functions like alert
  // aren't supported. They return false on IE (#2968).
  isFunction: function( obj ) {
    return jQuery.type(obj) === "function";
  },
  isArray: Array.isArray || function( obj ) {
    return jQuery.type(obj) === "array";
  },
  isWindow: function( obj ) {
    /* jshint eqeqeq: false */
    return obj != null && obj == obj.window;
  },
  isNumeric: function( obj ) {
    // parseFloat NaNs numeric-cast false positives (null|true|false|"")
    // ...but misinterprets leading-number strings, particularly hex literals ("0x...")
    // subtraction forces infinities to NaN
    return !jQuery.isArray( obj ) && obj - parseFloat( obj ) >= 0;
  },
  isEmptyObject: function( obj ) {
    var name;
    for ( name in obj ) {
      return false;
    }
    return true;
  },
  isPlainObject: function( obj ) {
    var key;
    // Must be an Object.
    // Because of IE, we also have to check the presence of the constructor property.
    // Make sure that DOM nodes and window objects don't pass through, as well
    if ( !obj || jQuery.type(obj) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
      return false;
    }
    try {
      // Not own constructor property must be Object
      if ( obj.constructor &&
        !hasOwn.call(obj, "constructor") &&
        !hasOwn.call(obj.constructor.prototype, "isPrototypeOf") ) {
        return false;
      }
    } catch ( e ) {
      // IE8,9 Will throw exceptions on certain host objects #9897
      return false;
    }
    // Support: IE<9
    // Handle iteration over inherited properties before own properties.
    if ( support.ownLast ) {
      for ( key in obj ) {
        return hasOwn.call( obj, key );
      }
    }
    // Own properties are enumerated firstly, so to speed up,
    // if last one is own, then all properties are own.
    for ( key in obj ) {}
    return key === undefined || hasOwn.call( obj, key );
  },
  type: function( obj ) {
    if ( obj == null ) {
      return obj + "";
    }
    return typeof obj === "object" || typeof obj === "function" ?
      class2type[ toString.call(obj) ] || "object" :
      typeof obj;
  },
  // Evaluates a script in a global context
  // Workarounds based on findings by Jim Driscoll
  // http://weblogs.java.net/blog/driscoll/archive/2009/09/08/eval-javascript-global-context
  globalEval: function( data ) {
    if ( data && jQuery.trim( data ) ) {
      // We use execScript on Internet Explorer
      // We use an anonymous function so that context is window
      // rather than jQuery in Firefox
      ( window.execScript || function( data ) {
        window[ "eval" ].call( window, data );
      } )( data );
    }
  },
  // Convert dashed to camelCase; used by the css and data modules
  // Microsoft forgot to hump their vendor prefix (#9572)
  camelCase: function( string ) {
    return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
  },
  nodeName: function( elem, name ) {
    return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
  },
  // args is for internal usage only
  each: function( obj, callback, args ) {
    var value,
      i = 0,
      length = obj.length,
      isArray = isArraylike( obj );
    if ( args ) {
      if ( isArray ) {
        for ( ; i < length; i++ ) {
          value = callback.apply( obj[ i ], args );
          if ( value === false ) {
            break;
          }
        }
      } else {
        for ( i in obj ) {
          value = callback.apply( obj[ i ], args );
          if ( value === false ) {
            break;
          }
        }
      }
    // A special, fast, case for the most common use of each
    } else {
      if ( isArray ) {
        for ( ; i < length; i++ ) {
          value = callback.call( obj[ i ], i, obj[ i ] );
          if ( value === false ) {
            break;
          }
        }
      } else {
        for ( i in obj ) {
          value = callback.call( obj[ i ], i, obj[ i ] );
          if ( value === false ) {
            break;
          }
        }
      }
    }
    return obj;
  },
  // Support: Android<4.1, IE<9
  trim: function( text ) {
    return text == null ?
      "" :
      ( text + "" ).replace( rtrim, "" );
  },
  // results is for internal usage only
  makeArray: function( arr, results ) {
    var ret = results || [];
    if ( arr != null ) {
      if ( isArraylike( Object(arr) ) ) {
        jQuery.merge( ret,
          typeof arr === "string" ?
          [ arr ] : arr
        );
      } else {
        push.call( ret, arr );
      }
    }
    return ret;
  },
  inArray: function( elem, arr, i ) {
    var len;
    if ( arr ) {
      if ( indexOf ) {
        return indexOf.call( arr, elem, i );
      }
      len = arr.length;
      i = i ? i < 0 ? Math.max( 0, len + i ) : i : 0;
      for ( ; i < len; i++ ) {
        // Skip accessing in sparse arrays
        if ( i in arr && arr[ i ] === elem ) {
          return i;
        }
      }
    }
    return -1;
  },
  merge: function( first, second ) {
    var len = +second.length,
      j = 0,
      i = first.length;
    while ( j < len ) {
      first[ i++ ] = second[ j++ ];
    }
    // Support: IE<9
    // Workaround casting of .length to NaN on otherwise arraylike objects (e.g., NodeLists)
    if ( len !== len ) {
      while ( second[j] !== undefined ) {
        first[ i++ ] = second[ j++ ];
      }
    }
    first.length = i;
    return first;
  },
  grep: function( elems, callback, invert ) {
    var callbackInverse,
      matches = [],
      i = 0,
      length = elems.length,
      callbackExpect = !invert;
    // Go through the array, only saving the items
    // that pass the validator function
    for ( ; i < length; i++ ) {
      callbackInverse = !callback( elems[ i ], i );
      if ( callbackInverse !== callbackExpect ) {
        matches.push( elems[ i ] );
      }
    }
    return matches;
  },
  // arg is for internal usage only
  map: function( elems, callback, arg ) {
    var value,
      i = 0,
      length = elems.length,
      isArray = isArraylike( elems ),
      ret = [];
    // Go through the array, translating each of the items to their new values
    if ( isArray ) {
      for ( ; i < length; i++ ) {
        value = callback( elems[ i ], i, arg );
        if ( value != null ) {
          ret.push( value );
        }
      }
    // Go through every key on the object,
    } else {
      for ( i in elems ) {
        value = callback( elems[ i ], i, arg );
        if ( value != null ) {
          ret.push( value );
        }
      }
    }
    // Flatten any nested arrays
    return concat.apply( [], ret );
  },
  // A global GUID counter for objects
  guid: 1,
  // Bind a function to a context, optionally partially applying any
  // arguments.
  proxy: function( fn, context ) {
    var args, proxy, tmp;
    if ( typeof context === "string" ) {
      tmp = fn[ context ];
      context = fn;
      fn = tmp;
    }
    // Quick check to determine if target is callable, in the spec
    // this throws a TypeError, but we will just return undefined.
    if ( !jQuery.isFunction( fn ) ) {
      return undefined;
    }
    // Simulated bind
    args = slice.call( arguments, 2 );
    proxy = function() {
      return fn.apply( context || this, args.concat( slice.call( arguments ) ) );
    };
    // Set the guid of unique handler to the same of original handler, so it can be removed
    proxy.guid = fn.guid = fn.guid || jQuery.guid++;
    return proxy;
  },
  now: function() {
    return +( new Date() );
  },
  // jQuery.support is not used in Core but other projects attach their
  // properties to it so it needs to exist.
  support: support
});
// Populate the class2type map
jQuery.each("Boolean Number String Function Array Date RegExp Object Error".split(" "), function(i, name) {
  class2type[ "[object " + name + "]" ] = name.toLowerCase();
});
function isArraylike( obj ) {
  var length = obj.length,
    type = jQuery.type( obj );
  if ( type === "function" || jQuery.isWindow( obj ) ) {
    return false;
  }
  if ( obj.nodeType === 1 && length ) {
    return true;
  }
  return type === "array" || length === 0 ||
    typeof length === "number" && length > 0 && ( length - 1 ) in obj;
}
var Sizzle =
/*!
 * Sizzle CSS Selector Engine v1.10.19
 * http://sizzlejs.com/
 *
 * Copyright 2013 jQuery Foundation, Inc. and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2014-04-18
 */
(function( window ) {
var i,
  support,
  Expr,
  getText,
  isXML,
  tokenize,
  compile,
  select,
  outermostContext,
  sortInput,
  hasDuplicate,
  // Local document vars
  setDocument,
  document,
  docElem,
  documentIsHTML,
  rbuggyQSA,
  rbuggyMatches,
  matches,
  contains,
  // Instance-specific data
  expando = "sizzle" + -(new Date()),
  preferredDoc = window.document,
  dirruns = 0,
  done = 0,
  classCache = createCache(),
  tokenCache = createCache(),
  compilerCache = createCache(),
  sortOrder = function( a, b ) {
    if ( a === b ) {
      hasDuplicate = true;
    }
    return 0;
  },
  // General-purpose constants
  strundefined = typeof undefined,
  MAX_NEGATIVE = 1 << 31,
  // Instance methods
  hasOwn = ({}).hasOwnProperty,
  arr = [],
  pop = arr.pop,
  push_native = arr.push,
  push = arr.push,
  slice = arr.slice,
  // Use a stripped-down indexOf if we can't use a native one
  indexOf = arr.indexOf || function( elem ) {
    var i = 0,
      len = this.length;
    for ( ; i < len; i++ ) {
      if ( this[i] === elem ) {
        return i;
      }
    }
    return -1;
  },
  booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
  // Regular expressions
  // Whitespace characters http://www.w3.org/TR/css3-selectors/#whitespace
  whitespace = "[\\x20\\t\\r\\n\\f]",
  // http://www.w3.org/TR/css3-syntax/#characters
  characterEncoding = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",
  // Loosely modeled on CSS identifier characters
  // An unquoted value should be a CSS identifier http://www.w3.org/TR/css3-selectors/#attribute-selectors
  // Proper syntax: http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
  identifier = characterEncoding.replace( "w", "w#" ),
  // Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
  attributes = "\
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