function tr_colors_func()
{
  this.tr_colorsClass       = "tr_colors";     // default class name
  this.color1         = "#FFFFFF"; // default
  this.color2         = "#F3F3F3"; // default
  this.firstRowColor  = "#FFFFFF"; // default

  this.allTables      = [];
  this.tr_colorsTables      = [];
  this.firstRow       = true;
  this.old_onload     = window.onload;
  window.onload       = this.init;
  window.tr_colorsReference = this;
};
tr_colors_func.prototype.noFirstRow       = tr_colors_noFirstRow;
tr_colors_func.prototype.init             = tr_colors_init;
tr_colors_func.prototype.setColor1        = tr_colors_setColor1;
tr_colors_func.prototype.setColor2        = tr_colors_setColor2;
tr_colors_func.prototype.setFirstRowColor = tr_colors_setFirstRowColor;
tr_colors_func.prototype.quickHexTest     = function( hexColor )
        {
                if( hexColor.indexOf("#") == -1 ){ hexColor = "#" + hexColor};
                var RE1 = /#[0-9A-Ga-g]{6}/;
                return RE1.test(hexColor);
        };


// ------------------------------------------------------ tr_colors_init
function tr_colors_init()
{
        if( !document.getElementsByTagName ){ return; };

        var tr_colors = window.tr_colorsReference;

        tr_colors.allTables = document.getElementsByTagName("table");

        for(var i=0; i < tr_colors.allTables.length; i++)
        {
                if( tr_colors.allTables[i].className.toLowerCase().indexOf(tr_colors.tr_colorsClass.toLowerCase()) != -1 )
                {
                        tr_colors.tr_colorsTables = tr_colors.tr_colorsTables.concat( tr_colors.allTables[i] );
                };
        };

        if(tr_colors.tr_colorsTables.length < 1){ return; };

        for(var jab = 0; jab < tr_colors.tr_colorsTables.length; jab++)
        {
                var table = tr_colors.tr_colorsTables[jab];

                if(tr_colors.firstRow) { table.rows[0].bgColor = tr_colors.firstRowColor; };

                var rowCount;
                (tr_colors.firstRow) ? (rowCount = 1) : (rowCount = 0);

                for(rowCount; rowCount < table.rows.length; rowCount++)
                {
                        var tableRow = table.rows[rowCount];
                        var rowColor;
                        (rowCount%2 == 0) ? (rowColor = tr_colors.color1) : (rowColor = tr_colors.color2);
                        tableRow.bgColor = rowColor;
                };
        };
};

// ------------------------------------------------------ tr_colors_noFirstRow
function tr_colors_noFirstRow()
{
        this.firstRow = false;
};

// ------------------------------------------------------ tr_colors_setColor1
function tr_colors_setColor1( hexColor )
{
        if( this.quickHexTest(hexColor) ){ this.color1 = hexColor; };
        return;
};

// ------------------------------------------------------ tr_colors_setColor2
function tr_colors_setColor2( hexColor )
{
        if( this.quickHexTest(hexColor) ){ this.color2 = hexColor; };
        return;
};

// ------------------------------------------------------ tr_colors_setFirstRowColor
function tr_colors_setFirstRowColor( hexColor )
{
        if( this.quickHexTest(hexColor) ){ this.firstRowColor = hexColor; };
        return;
};


// instantiation call
var tr_colors = new tr_colors_func();