/**
 * This array is used to remember mark status of rows in browse mode
 */
var marked_row = new Array;


/**
 * Sets/unsets the pointer and marker in browse mode
 *
 * @param   object    the table row
 * @param   integer  the row number
 * @param   string    the action calling this script (over, out or click)
 * @param   string    the default background color
 * @param   string    the color to use for mouseover
 * @param   string    the color to use for marking a row
 *
 * @return  boolean  whether pointer is set or not
 */
function setPointer(theRow, theRowNum, theAction, theDefaultColor, thePointerColor, theMarkColor)
{
    var theCells = null;

    // 1. Pointer and mark feature are disabled or the browser can't get the
    //    row -> exits
    if ((thePointerColor == '' && theMarkColor == '')
        || typeof(theRow.style) == 'undefined') {
        return false;
    }


    // 2. Gets the current row and exits if the browser can't get it
    if (typeof(document.getElementsByTagName) != 'undefined') {
        theCells = theRow.getElementsByTagName('td');
    }
    else if (typeof(theRow.cells) != 'undefined') {
        theCells = theRow.cells;
    }
    else {
        return false;
    }

    // 3. Gets the current color...
    var rowCellsCnt  = theCells.length;
    var domDetect    = null;
    var currentColor = null;
    var newColor     = null;
    // 3.1 ... with DOM compatible browsers except Opera that does not return
    //         valid values with "getAttribute"
    if (typeof(window.opera) == 'undefined'
        && typeof(theCells[0].getAttribute) != 'undefined') {
        currentColor = theCells[0].getAttribute('bgcolor');
        domDetect    = true;
    }
    // 3.2 ... with other browsers
    else {
        currentColor = theCells[0].style.backgroundColor;
        domDetect    = false;
    } // end 3

    // 3.3 ... Opera changes colors set via HTML to rgb(r,g,b) format so fix it
    if (currentColor.indexOf("rgb") >= 0)
    {
        var rgbStr = currentColor.slice(currentColor.indexOf('(') + 1,
                                     currentColor.indexOf(')'));
        var rgbValues = rgbStr.split(",");
        currentColor = "#";
        var hexChars = "0123456789ABCDEF";
        for (var i = 0; i < 3; i++)
        {
            var v = rgbValues[i].valueOf();
            currentColor += hexChars.charAt(v/16) + hexChars.charAt(v%16);
        }
    }

    // 4. Defines the new color
    // 4.1 Current color is the default one
    if (currentColor == ''
        || currentColor.toLowerCase() == theDefaultColor.toLowerCase()) {
        if (theAction == 'over' && thePointerColor != '') {
            newColor              = thePointerColor;
        }
        else if (theAction == 'click' && theMarkColor != '') {
            newColor              = theMarkColor;
            marked_row[theRowNum] = true;
            // Garvin: deactivated onclick marking of the checkbox because it's also executed
            // when an action (like edit/delete) on a single item is performed. Then the checkbox
            // would get deactived, even though we need it activated. Maybe there is a way
            // to detect if the row was clicked, and not an item therein...
            // document.getElementById('id_rows_to_delete' + theRowNum).checked = true;
        }
    }
    // 4.1.2 Current color is the pointer one
    else if (currentColor.toLowerCase() == thePointerColor.toLowerCase()
             && (typeof(marked_row[theRowNum]) == 'undefined' || !marked_row[theRowNum])) {
        if (theAction == 'out') {
            newColor              = theDefaultColor;
        }
        else if (theAction == 'click' && theMarkColor != '') {
            newColor              = theMarkColor;
            marked_row[theRowNum] = true;
            // document.getElementById('id_rows_to_delete' + theRowNum).checked = true;
        }
    }
    // 4.1.3 Current color is the marker one
    else if (currentColor.toLowerCase() == theMarkColor.toLowerCase()) {
        if (theAction == 'click') {
            newColor              = (thePointerColor != '')
                                  ? thePointerColor
                                  : theDefaultColor;
            marked_row[theRowNum] = (typeof(marked_row[theRowNum]) == 'undefined' || !marked_row[theRowNum])
                                  ? true
                                  : null;
            // document.getElementById('id_rows_to_delete' + theRowNum).checked = false;
        }
    } // end 4

    // 5. Sets the new color...
    if (newColor) {
        var c = null;
        // 5.1 ... with DOM compatible browsers except Opera
        if (domDetect) {
            for (c = 0; c < rowCellsCnt; c++) {
                theCells[c].setAttribute('bgcolor', newColor, 0);
            } // end for
        }
        // 5.2 ... with other browsers
        else {
            for (c = 0; c < rowCellsCnt; c++) {
                theCells[c].style.backgroundColor = newColor;
            }
        }
    } // end 5

    return true;
} // end of the 'setPointer()' function

/*
 * Sets/unsets the pointer and marker in vertical browse mode
 *
 * @param   object    the table row
 * @param   integer   the column number
 * @param   string    the action calling this script (over, out or click)
 * @param   string    the default background color
 * @param   string    the color to use for mouseover
 * @param   string    the color to use for marking a row
 *
 * @return  boolean  whether pointer is set or not
 *
 * @author Garvin Hicking <me@supergarv.de> (rewrite of setPointer.)
 */
function setVerticalPointer(theRow, theColNum, theAction, theDefaultColor1, theDefaultColor2, thePointerColor, theMarkColor) {
    var theCells = null;
    var tagSwitch = null;

    // 1. Pointer and mark feature are disabled or the browser can't get the
    //    row -> exits
    if ((thePointerColor == '' && theMarkColor == '')
        || typeof(theRow.style) == 'undefined') {
        return false;
    }

    if (typeof(document.getElementsByTagName) != 'undefined') {
        tagSwitch = 'tag';
    } else if (typeof(document.getElementById('table_results')) != 'undefined') {
        tagSwitch = 'cells';
    } else {
        return false;
    }

    // 2. Gets the current row and exits if the browser can't get it
    if (tagSwitch == 'tag') {
        theRows     = document.getElementById('table_results').getElementsByTagName('tr');
        theCells    = theRows[1].getElementsByTagName('td');
    } else if (tagSwitch == 'cells') {
        theRows     = document.getElementById('table_results').rows;
        theCells    = theRows[1].cells;
    }

    // 3. Gets the current color...
    var rowCnt         = theRows.length;
    var domDetect      = null;
    var currentColor   = null;
    var newColor       = null;

    // 3.1 ... with DOM compatible browsers except Opera that does not return
    //         valid values with "getAttribute"
    if (typeof(window.opera) == 'undefined'
        && typeof(theCells[theColNum].getAttribute) != 'undefined') {
        currentColor = theCells[theColNum].getAttribute('bgcolor');
        domDetect    = true;
    }
    // 3.2 ... with other browsers
    else {
        domDetect    = false;
        currentColor = theCells[theColNum].style.backgroundColor;
    } // end 3

    var c = null;

    // 4. Defines the new color
    // 4.1 Current color is the default one
    if (currentColor == ''
        || currentColor.toLowerCase() == theDefaultColor1.toLowerCase()
        || currentColor.toLowerCase() == theDefaultColor2.toLowerCase()) {
        if (theAction == 'over' && thePointerColor != '') {
            newColor              = thePointerColor;
        } else if (theAction == 'click' && theMarkColor != '') {
            newColor              = theMarkColor;
            marked_row[theColNum] = true;
        }
    }
    // 4.1.2 Current color is the pointer one
    else if (currentColor.toLowerCase() == thePointerColor.toLowerCase() &&
             (typeof(marked_row[theColNum]) == 'undefined' || !marked_row[theColNum]) || marked_row[theColNum] == false) {
            if (theAction == 'out') {
                if (theColNum % 2) {
                    newColor              = theDefaultColor1;
                } else {
                    newColor              = theDefaultColor2;
                }
            }
            else if (theAction == 'click' && theMarkColor != '') {
                newColor              = theMarkColor;
                marked_row[theColNum] = true;
            }
    }
    // 4.1.3 Current color is the marker one
    else if (currentColor.toLowerCase() == theMarkColor.toLowerCase()) {
        if (theAction == 'click') {
            newColor              = (thePointerColor != '')
                                  ? thePointerColor
                                  : ((theColNum % 2) ? theDefaultColor1 : theDefaultColor2);
            marked_row[theColNum] = false;
        }
    } // end 4

    // 5 ... with DOM compatible browsers except Opera

    for (c = 0; c < rowCnt; c++) {
        if (tagSwitch == 'tag') {
            Cells = theRows[c].getElementsByTagName('td');
        } else if (tagSwitch == 'cells') {
            Cells = theRows[c].cells;
        }

        Cell  = Cells[theColNum];

        // 5.1 Sets the new color...
        if (newColor) {
            if (domDetect) {
                Cell.setAttribute('bgcolor', newColor, 0);
            } else {
                Cell.style.backgroundColor = newColor;
            }
        } // end 5
    } // end for

     return true;
 } // end of the 'setVerticalPointer()' function