/*
Nombre: f_trim
Descripción: Quita espacios a la izquierda y derecha de un string
Parametros: String al que se le quitarán los espacios
Retorno: String
*/
function f_trim(TRIM_VALUE)
{
        if(TRIM_VALUE.length < 1){
        return"";
        }
        TRIM_VALUE = f_rtrim(TRIM_VALUE);
        TRIM_VALUE = f_ltrim(TRIM_VALUE);
        if(TRIM_VALUE=="")
        {
                return "";
        }
        else
        {
                return TRIM_VALUE;
        }
} //End Function

/*
Nombre: f_rtrim
Descripción: Quita espacios a la derecha de un string
Parametros: String al que se le quitarán los espacios
Retorno: String
*/
function f_rtrim(VALUE)
{
        var w_space = String.fromCharCode(32);
        var v_length = VALUE.length;
        var strTemp = "";
        if(v_length < 0)
        {
                return"";
        }
        var iTemp = v_length -1;

        while(iTemp > -1)
        {
                if(VALUE.charAt(iTemp) == w_space)
                {
                }
                else
                {
                        strTemp = VALUE.substring(0,iTemp +1);
                        break;
                }
                iTemp = iTemp-1;
        } //End While
        return strTemp;
} //End Function

/*
Nombre: f_ltrim
Descripción: Quita espacios a la izquierda de un string
Parametros: String al que se le quitarán los espacios
Retorno: String
*/
function f_ltrim(VALUE)
{
        var w_space = String.fromCharCode(32);

        if(v_length < 1)
        {
                return"";
        }
        var v_length = VALUE.length;
        var strTemp = "";
        var iTemp = 0;

        while(iTemp < v_length)
        {
                if(VALUE.charAt(iTemp) == w_space)
                {
                }
                else
                {
                        strTemp = VALUE.substring(iTemp,v_length);
                        break;
                }
                iTemp = iTemp + 1;
        } //End While
        return strTemp;
} //End Function

/**
 * Para usar la función SetPointer ubicar este código en el tag <TR onmous....>
 *
 * onmousedown="setPointer(this, 0, 'click', '#DDDDDD', '#CCFFCC', '#FFCC99');"
 * onmouseover="setPointer(this, 0, 'over', '#DDDDDD', '#CCFFCC', '#FFCC99');"
 * onmouseout="setPointer(this, 0, 'out', '#DDDDDD', '#CCFFCC', '#FFCC99');">
 */
/**
 * 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   interger  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, celdaInicial)
{
    var theCells = null;

    if (typeof(theRow) == 'undefined')
        return false;
    // 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[celdaInicial].getAttribute) != 'undefined') {
        currentColor = theCells[celdaInicial].getAttribute('bgcolor');
        domDetect    = true;
    }
    // 3.2 ... with other browsers
    else {
        currentColor = theCells[celdaInicial].style.backgroundColor;
        domDetect    = false;
    } // end 3

    // 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;
        }
    }
    // 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;
        }
    }
    // 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;
        }
    } // end 4
//alert(newColor);
    // 5. Sets the new color...
    if (newColor) {
        var c = null;
        // 5.1 ... with DOM compatible browsers except Opera
        if (domDetect) {
            for (c = celdaInicial; c < rowCellsCnt; c++) {
                theCells[c].setAttribute('bgcolor', newColor, 0);
            } // end for
        }
        // 5.2 ... with other browsers
        else {
            for (c = celdaInicial; c < rowCellsCnt; c++) {
                theCells[c].style.backgroundColor = newColor;
            }
        }
    } // end 5

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