Entry

how do I search for a particular string inside the options of a select object??

Feb 3rd, 2005 03:54
jsWalter, Mir Ali,

Here are the 3 function I use to do just that! 
This is part of a larger, more extensive, SELECT Object Class 
Walter 
==================================== 
// {{{ findOptionByValue() 
   /** 
    * Method public void findOptionByValue( object, string ) 
    * 
    * Find an Option Item of a Select Object by its OPTION Value, 
    * or if OPTION does not have a value, its Display Text 
    * 
    * @name findOptionByValue 
    * @author Walter Torres <jsWalter@torres.ws> 
    * 
    * @category SELECT Object Extentions 
    * @uses findOption() 
    * 
    * @access public 
    * @since v1.3 
    * 
    * @param mixed  Reference to Select Form Object, or its ID name 
    * @param string Select OPTION Value to search for 
    * @return mixed integer of OPTION index, or Boolean FALSE if not 
found 
    * 
    */ 
    function findOptionByValue($objSelect, $strValue) 
    { 
        // Straight pass-through 
        return findOption($objSelect, $strValue, 'value' ); 
    }; 
// }}} 
// {{{ findOptionByText() 
   /** 
    * Method public void findOptionByText( object, string ) 
    * 
    * Find an Option Item of a Select Object by its Display Text 
    * 
    * @name findOptionByText 
    * @author Walter Torres <jsWalter@torres.ws> 
    * 
    * @category SELECT Object Extentions 
    * @uses findOption() 
    * 
    * @access public 
    * @since v1.3 
    * 
    * @param mixed  Reference to Select Form Object, or its ID name 
    * @param string Select OPTION Display Text to search for 
    * @return mixed integer of OPTION index, or Boolean FALSE if not 
found 
    * 
    */ 
    function findOptionByText($objSelect, $strText) 
    { 
        // Straight pass-through 
        return findOption($objSelect, $strText, 'text' ); 
    }; 
// }}} 
// {{{ findOption() 
   /** 
    * Method public void findOption( object, string, string ) 
    * 
    * Find an Option Item of a Select Object by its Display Text 
    * or OPTION value 
    * 
    * @name findOption() 
    * @author Walter Torres <jsWalter@torres.ws> 
    * 
    * @category SELECT Object Extentions 
    * @uses none 
    * 
    * @access public 
    * @since v1.3 
    * 
    * @param mixed  Reference to Select Form Object, or its ID name 
    * @param string What to look for 
    * @param string Where to look for it, 'text' or 'value' 
    * @return mixed integer of OPTION index, or Boolean FALSE if not 
found 
    * 
    */ 
    function findOption($objSelect, $strNeedle, $strSearch) 
    { 
       /** 
        * Default return value 
        * 
        * Returns the index of a found OPTION Item or boolean upon 
failure 
        * Default value is set at FALSE 
        * 
        * @var mixed $_found index of a found OPTION Item or not 
        * @access private 
        * @static 
        */ 
        var $_found = new Boolean( false ); 
        // If $objSelect is a nothing [''], convert to a NULL 
        if ( $objSelect == '' ) 
            $objSelect = null; 
        // If $objSelect is a string, convert to Object Reference 
        // Then see if Object Reference exists 
        else if ( ( typeof ( $objSelect ) ) == 'string' ) 
            $objSelect = document.getElementById($objSelect); 
        // If we have nothing to deal with, just bale... 
        if ( ( $objSelect ) && ( $strNeedle ) && 
             ( ( $strSearch == 'text' ) || ( $strSearch == 
'value' ) ) ) 
        { 
            for (var $i = 0; $i < $objSelect.options.length; $i++) 
            { 
                if ( $strSearch == 'value' ) 
                    $objHayStack = $objSelect[$i].value; 
                else if ( $strSearch == 'text' ) 
                    $objHayStack = $objSelect[$i].text; 
                if ( $objHayStack == $strNeedle ) 
                { 
                    $_found = parseInt ( $i ); // We found a match 
                    break; 
                } 
            } 
        } 
        // Send back what we have 
        return $_found; 
    }; 
// }}}