js复制文本到剪贴板

1.该js 暂时只能兼容ie浏览器

var Fe = Fe || {
           version: "20080809",
           emptyFn: function () { }
       };
       Fe.G = function () {
           for (var b = [], c = arguments.length - 1; c > -1; c--) {
               var d = arguments[c];
               b[c] = null;
               if (typeof d == "object" && d && d.dom) {
                   b[c] = d.dom
               } else {
                   if ((typeof d == "object" && d && d.tagName) || d == window || d == document) {
                       b[c] = d
                   } else {
                       if (typeof d == "string" && (d = document.getElementById(d))) {
                           b[c] = d
                       }
                   }
               }
           }
           return b.length < 2 ? b[0] : b
       };
       Fe.copy = function (b) {
           var a = Fe.copy._node;
           if (!a) {
               a = Fe.copy._node = document.createElement("DIV");
               a.style.position = "absolute";
               a.style.top = "-1000px";
               a.style.left = "-1000px";
               document.body.appendChild(a)
           }
           a.innerHTML = ["<embed ", 'src="/Content/images/map/clipboard.swf" ', 'FlashVars="clipboard=', encodeURIComponent(String(b)), '" ', 'width="0" ', 'height="0" ', 'type="application/x-shockwave-flash"></embed>'].join("")
       };
       function copy() {
           var c = Fe.G("UserName");
           var b = c.value;
           if (!b) {
               return
           }
           if (window.clipboardData) {
               window.clipboardData.clearData();
               window.clipboardData.setData("Text", b);
               if (Fe.G("copyMessage")) {
                   Fe.G("copyMessage").style.display = ""
               }
               setTimeout(function () {
                   if (Fe.G("copyMessage")) {
                       Fe.G("copyMessage").style.display = "none"
                   }
               },
        1000)
           } else {
               try {
                   Fe.copy(b);
                   if (Fe.G("copyMessage")) {
                       Fe.G("copyMessage").style.display = ""
                   }
                   setTimeout(function () {
                       if (Fe.G("copyMessage")) {
                           Fe.G("copyMessage").style.display = "none"
                       }
                   },
            1000);
                   return b
               } catch (a) { }
           }
       }