重构Javascript代码

今天有做了几个asp.net结合Javascript的教程文章。现回顾头来看看那些Javascript脚本，有写得不太理想，过于复杂。现Insus.NET抽取出来，重构它们。

第一篇是http://www.cnblogs.com/insus/archive/2013/01/20/2868532.html 原来的Javascript脚本:

function SelectedAll(cb) {
            cb.checked = cb.checked ? false : true;
            var gv = document.getElementById('<%=GridViewCouplets.ClientID %>');
            var rc = gv.rows.length;

            for (var i = 1; i < rc; i++) {
                var input = gv.rows[i].cells[0].getElementsByTagName("input");
                if (input[0].type == "checkbox" && input[0].checked) {
                    input[0].checked = false;
                    gv.rows[i].style.backgroundColor = "";
                }
                else {
                    input[0].checked = true;
                    gv.rows[i].style.backgroundColor = "#66ff33;";
                }
            }
        }

        function SelectedSingle(cb) {
            var row = cb.parentNode.parentNode;
            if (cb.checked) {
                row.style.backgroundColor = "#66ff33;";
            }
            else {
                row.style.backgroundColor = "";
            }
        }

经过重构之后的Javascript脚本:

 function SelectedAll(cb) {
            var gv = document.getElementById('<%=GridViewCouplets.ClientID %>');
            var rc = gv.rows.length;

            for (var i = 1; i < rc; i++) {
                var input = gv.rows[i].cells[0].getElementsByTagName("input");

                if (input[0].type == "checkbox")
                {
                    input[0].checked = cb.checked;
                    gv.rows[i].style.backgroundColor = input[0].checked ? "#66ff33;" :"";
                }
            }
        }

        function SelectedSingle(cb) {
            var row = cb.parentNode.parentNode;           
                row.style.backgroundColor = cb.checked?  "#66ff33;":"";            
        }

另外一篇http://www.cnblogs.com/insus/archive/2013/01/20/2868766.html 原来的Javascript脚本：

 function Check_Uncheck_All(cb) {
            var cbl = document.getElementById("<%=CheckBoxListMusicType.ClientID%>");
            var input = cbl.getElementsByTagName("input");

            if (cb.checked) {
                for (var i = 0; i < input.length; i++) {
                    input[i].checked = true;
                }
            }
            else {
                for (var i = 0; i < input.length; i++) {
                    input[i].checked = false;
                }
            }            
        }

重构之后的Javascript脚本：

 function Check_Uncheck_All(cb) {
            var cbl = document.getElementById("<%=CheckBoxListMusicType.ClientID%>");
            var input = cbl.getElementsByTagName("input");

            for (var i = 0; i < input.length; i++) {
                input[i].checked = cb.checked;
            }
        }