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<! Doctype html public "-// W3C // dtd html 4.0 Transitional // EN"> <! -- Saved from url = (0058) http://www.barelyfitz.com/projects/filterlist/example.html --> <HTML> <HEAD> <TITLE> Filterlist Example </TITLE> <META http-equiv = Content-Type content = "text/html; charset = gb2312 "> <script type =" text/javascript "> <! --/* = =================* $ Id: filterlist. js, v 1.3 2003/10/08 17:13:49 pat Exp $ Copyright 2003 Patrick Fitzgerald http://www.barelyfitz.com/webdesign/articles/filterlist/ This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. this program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A P Articular purpose. see the GNU General Public License for more details. you shoshould have written ed a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc ., 59 Temple Place, Suite 330, Boston, MA? -1307 USA * ============================================ ================= */function filterlist (selectobj) {// ============================================== ================/// PARAMETERS // ================================== ============================================/// html select object // For example, set this to document. myform. myselect this. selectobj = selectobj; // Flags for regexp matching. // "I" = ignore case; "" = do not ignore case // Yo U can use the set_ignore_case () method to set this. flags = 'I'; // Which parts of the select list do you want to match? This. match_text = true; this. match_value = false; // You can set the hook variable to a function that // is called whenever the select list is filtered. // For example: // this. hook = function () {// alert ()} // Flag for debug alerts // Set to true if you are having problems. this. show_debug = false; // ================================================ ================/// METHODS // ================================= ============ ========================/// ------------------------------------------------------------ This. init = function () {// This method initilizes the object. // This method is called automatically when you create the object. // You shocould call this again if you alter the selectobj parameter. if (! This. selectobj) return this. debug ('selectobj not defined'); if (! This. selectobj. options) return this. debug ('selectobj. options not defined '); // Make a copy of the select list options array this. optionscopy = new Array (); if (this. selectobj & this. selectobj. options) {for (var I = 0; I <this. selectobj. options. length; I ++) {// Create a new Option this. optionscopy [I] = new Option (); // Set the text for the Option this. optionscopy [I]. text = selectobj. options [I]. tex T; // Set the value for the Option. // If the value wasn't set in the original select list, // then use the text. if (selectobj. options [I]. value) {this. optionscopy [I]. value = selectobj. options [I]. value;} else {this. optionscopy [I]. value = selectobj. options [I]. text ;}}}// -------------------------------------------------------- this. reset = function () {// This method resets the select list to Original state. // It also unselects all of the options. this. set ('');} // ------------------------------------------------------ this. set = function (pattern) {// This method removes all of the options from the select list, // then adds only the options that match the pattern regexp. // It also unselects all of the options. var loop = 0, index = 0, regexp, e; if (! This. selectobj) return this. debug ('selectobj not defined'); if (! This. selectobj. options) return this. debug ('selectobj. options not defined '); // Clear the select list so nothing is displayed this. selectobj. options. length = 0; // Set up the regular expression. // If there is an error in the regexp, // then return without selecting any items. try {// Initialize the regexp = new RegExp (pattern, this. flags);} catch (e) {// There was an error creating the regexp. // If the user specified a function hook, // call it now, then return if (typeof this. hook = 'function') {this. hook ();} return;} // Loop through the entire select list and // add the matching items to the select list for (loop = 0; loop <this. optionscopy. length; loop ++) {// This is the option that we're re currently testing var option = this. optionscopy [loop]; // Check if we have a match if (this. match_text & regexp. test (option. text) | (this. match_value & regexp. test (option. value) {// We have a match, so add this option to the select list // and increment the index this. selectobj. options [index ++] = new Option (option. text, option. value, false) ;}// If the user specified a function hook, // call it now if (typeof this. hook = 'function') {this. hook () ;}// -------------------------------------------------------- this. set_ignore_case = function (value) {// This method sets the regexp flags. // If value is true, sets the flags to "I ". // If value is false, sets the flags "". if (value) {this. flags = 'I';} else {this. flags = ''; }}// ------------------------------------------------------ this. debug = function (msg) {if (this. show_debug) {alert ('filterlist: '+ msg );}} // ================================================ ==============/// Initialize the object // ============================= ================================ this. init ();} // --> script <META content = "MSHTML 6.00.2900.3020" name = GENERATOR> </HEAD> <BODY> Filterlist Example </P> </BODY> </HTML>
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