function delTheSameForCompare() {
            var tbody = document.getElementById("tal");//获取到指定的tbody
            var tr = tbody.children;//获取tbody下面全部的tr


            if (document.getElementById("checkDiffer").checked) 
            {
                for (var i = 0; i < tr.length; i++) //遍历tr
                {

                    if (i >= 2) 
                    {

                        var tds = tr[i].children;//找到tr下面的子元素

                        if (tds[1].innerText == tds[2].innerText) //对比td中的内容如果相同的话 隐藏
                        {
                            tr[i].style.display = "none"


                        }
                    }

                }


            }
            else {

                var tbody = document.getElementById("tal");
                var tr = tbody.children;
                for (var i = 0; i < tr.length; i++) {


                    tr[i].style.display = "block"


                }
            }





        }

  

 

 

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