<p>1.用电脑打开网址：<span id="span">www.baidu.com</span><a id="a" href="javascript:void(0)" onclick="copyFunc()">（点击复制）</a></p>

         $(function () {

            $(document.body).bind("copy",function(e){

                var cpTxt = document.getElementById('span').innerHTML;

                var clipboardData = window.clipboardData; //for IE

                if (!clipboardData) { // for chrome

                    clipboardData = e.originalEvent.clipboardData;

                }

                //e.clipboardData.getData('text');//可以获取用户选中复制的数据

                clipboardData.setData('Text', cpTxt);

                alert("已复制到剪贴板");

                return false;//否则设不生效

            })

        })

        function copyFunc(e){

            document.designMode = "on";

            document.execCommand('copy', true);

            document.designMode = "off";

        }