用Jquery实现的一个Table的帮助js

主要实现的table的辅助功能有：获得当前td的上，下，左，右的td，获得上下tr，获得当前td所处的行列等。

注意：

    表格中最好不要再套表格，否则可能导致方法失效。

    每个table必须有一个id以便有些方法使用。

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//***********************************************************
//* author：scott qian
//* date：2011/07/23
//* description：a table helper js based on JQuery
//***********************************************************
 
/// <reference path="jquery-1.4.1.min.js" />
 
//Get the current row index(start from 0)
function GetCurrentRowIndex(currentTd) {
    return $(currentTd).parent().prevAll("tr").length;
}
 
//Get the current column index(start from 0)
function GetCurrentColumnIndex(currentTd) {
    var num = 0;
    while (true) {
        currentTd = $(currentTd).prev("td");
        if (currentTd.html() == null) {
            break;
        }
        num++;
    }
    return num;
}
 
//Get sum row count of the table
function GetTableRowCount(tableId) {
    return $("#" + tableId + " tr").length;
}
 
//Get sum column count of current row
function GetCurrentRowColumnCount(currentTd) {
    var tempTd = currentTd;
    var num = 0;
 
    //previous count of currentTd
    var prevCount = GetCurrentColumnIndex(currentTd);
    num += prevCount;
 
    //next count of currentId
    while (true) {
        tempTd = $(tempTd).next("td");
        if (tempTd.html() == null) {
            break;
        }
        num++;
    }
 
    //include currentTd itself
    return num + 1;
}
 
//Get the previous td element of current td element
function GetPrevTd(currentTd) {
    return $(currentTd).prev("td");
}
 
function GetPrevTr(currentTd) {
    return $(currentTd).parent().prev("tr");
}
 
//Get the last td element of current td element
function GetNextTd(currentTd) {
    return $(currentTd).next("td");
}
 
function GetNextTr(currentTd) {
    return $(currentTd).parent().next("tr");
}
 
//Get the td element above current td element
function GetAboveTd(currentTd) {
    var currentColumn = GetCurrentColumnIndex(currentTd);
    return GetPrevTr(currentTd).children("td:eq(" + currentColumn + ")");
}
 
//Get the td element below current td element
function GetBelowTd(currentTd) {
    var currentColumn = GetCurrentColumnIndex(currentTd);
    return GetNextTr(currentTd).children("td:eq(" + currentColumn + ")");
}
 
//Get all odd tr element
function GetOddTr(tableId) {
    return $("#" + tableId + " tr:odd");
}
 
//Get all even tr element
function GetEvenTr(tableId) {
    return $("#" + tableId + " tr:even");
}
 
//Give odd tr elements background color
function BackgroundColorOddTr(tableId, color) {
    GetOddTr(tableId).each(function () {
        $(this).css("background-color", color); 
     });
}
 
//Give even tr elements background color
function BackgroundColorEvenTr(tableId, color) {
    GetEvenTr(tableId).each(function () {
        $(this).css("background-color", color);
    });
}