使用js复制链接中的部分文字的方法

javascript: (function() {
  var h, checked = true,
  down = false;
  document.addEventListener('mouseover',
  function(e) {
    var link, c = '',
    target = e.target;
    if (target.nodeName == 'A') {
      if (target.hasChildNodes) {
        for (var i = 0; i < target.childNodes.length; i++) {
          if (target.childNodes[i].nodeName == 'INPUT') return;
        }
      }
      link = target;
    }
    if (target.parentNode.nodeName == 'A' && target.nodeName != 'IMG' && target.nodeName != 'INPUT') {
      link = target.parentNode;
    }
    if (!link) return;
    if (checked) {
      h = link.href;
      if (link.style.cssText) c = link.style.cssText;
    }
    function _click(e) {
      link.removeEventListener(e.type, arguments.callee, false);
      e.preventDefault();
    }
    function _keydown(e) {
      var k = parseInt(e.keyCode);
      if (k < 48 && k != 17) return;
      document.removeEventListener(e.type, arguments.callee, false);
      down = true;
      link.removeAttribute('href');
      link.setAttribute('style', c + 'cursor:text!important;');
      link.addEventListener('click', _click, false);
    }
    document.addEventListener('keydown', _keydown, false);
    link.addEventListener('mouseout',
    function(e) {
      var k = link.compareDocumentPosition(e.relatedTarget);
      if (k == 20 || k == 0) {
        checked = false;
      } else {
        link.removeEventListener(e.type, arguments.callee, false);
        link.removeEventListener('click', _click, false);
        document.removeEventListener('keydown', _keydown, false);
        checked = true;
        if (down) {
          down = false;
          link.setAttribute('href', h);
          if (c == '') {
            link.removeAttribute('style');
          } else {
            link.setAttribute('style', c);
          }
        }
      }
    },
    false);
  },
  false);
})();