📄 22.5 ajax效果的字符串过滤.htm
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<HTML><HEAD><TITLE>过滤字符实例</TITLE>
<script type="text/javascript">
function filterlist(selectobj) {
// 过滤对象
this.selectobj = selectobj;
//要过滤得字符-i表示忽略大小写，""表示不忽略
this.flags = 'i';
// 要过滤的项-选择是文本还是值
this.match_text = true;
this.match_value = false;
//调试参数
this.show_debug = false;
//初始化的方法
this.init = function() {
if (!this.selectobj) return this.debug('没有实现过滤的控件');
if (!this.selectobj.options) return this.debug('过滤控件中没有内容');
//制作选择项的副本
this.optionscopy = new Array();
if (this.selectobj && this.selectobj.options) {
for (var i=0; i < this.selectobj.options.length; i++) {
// 创建一个新的选择项对象
this.optionscopy[i] = new Option();
// 设置选择项的文本
this.optionscopy[i].text = selectobj.options[i].text;
// 设置选择项的值
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() { //重置选择项
this.set('');
}
//实现过滤的方法
this.set = function(pattern) {
var loop=0, index=0, regexp, e;
if (!this.selectobj) return this.debug('没有实现过滤的控件');
if (!this.selectobj.options) return this.debug('过滤控件中没有内容');
// 清空列表中的内容
this.selectobj.options.length = 0;
// 使用正则实现字符过滤-初始化正则
try {
regexp = new RegExp(pattern, this.flags);
} catch(e) {
if (typeof this.hook == 'function') {
this.hook();
}
return;
}
// 循环添加过滤后的结果
for (loop=0; loop < this.optionscopy.length; loop++) {
// 定义选择项
var option = this.optionscopy[loop];
// 实现正则式过滤
if ((this.match_text && regexp.test(option.text)) ||
(this.match_value && regexp.test(option.value))) {
// 使用过滤结果创建新选择项
this.selectobj.options[index++] =
new Option(option.text, option.value, false);
}
}
if (typeof this.hook == 'function') {
this.hook();
}
}
//设置正则表达式的过滤标志
this.set_ignore_case = function(value) {
if (value) {
this.flags = 'i';
} else {
this.flags = '';
}
}
this.debug = function(msg) { //调试方法
if (this.show_debug) {
alert('过滤结果: ' + msg);
}
}
this.init(); //调用初始化方法
}
</script>
</HEAD>
<BODY>
<H1>过滤字符实例</H1>
<FORM name=myform action=""><SELECT size=5 name=myselect> <OPTION>Aefdf
Rsses<OPTION>Lbadmn Adjlf<OPTION>Monica Betty<OPTION>Daniel
Jack<OPTION>Bill Gayes<OPTION>Lama Tampel<OPTION>Natty
Lees<OPTION>Harry J. Leoo<OPTION>Matty McColm<OPTION>Carrie-Anne
Moss<OPTION>Collin Chou<OPTION>Genevieve O'Reilly<OPTION>Harold Perrineau
Jr.<OPTION>Jada Pinkett Smith<OPTION>Adrian Rayment<OPTION>Neil
Rayment<OPTION>Bruce Spence<OPTION>Hugo Weaving<OPTION>Lambert
Wilson<OPTION>Anthony Wong</OPTION></SELECT>
<SCRIPT type=text/javascript>
var myfilter = new filterlist(document.myform.myselect); //调用过滤的方法
</SCRIPT>
<P>过滤： <A title="Clear the filter"
href="javascript:myfilter.reset()">重置</A> <A
title="Show items starting with A" href="javascript:myfilter.set('^A')">A</A> <A
title="Show items starting with B" href="javascript:myfilter.set('^B')">B</A> <A
title="Show items starting with C" href="javascript:myfilter.set('^C')">C</A> <A
title="Show items starting with D" href="javascript:myfilter.set('^D')">D</A> <A
title="Show items starting with E" href="javascript:myfilter.set('^E')">E</A> <A
title="Show items starting with F" href="javascript:myfilter.set('^F')">F</A> <A
title="Show items starting with G" href="javascript:myfilter.set('^G')">G</A> <A
title="Show items starting with H" href="javascript:myfilter.set('^H')">H</A> <A
title="Show items starting with I" href="javascript:myfilter.set('^I')">I</A> <A
title="Show items starting with J" href="javascript:myfilter.set('^J')">J</A> <A
title="Show items starting with K" href="javascript:myfilter.set('^K')">K</A> <A
title="Show items starting with L" href="javascript:myfilter.set('^L')">L</A> <A
title="Show items starting with M" href="javascript:myfilter.set('^M')">M</A> <A
title="Show items starting with N" href="javascript:myfilter.set('^N')">N</A> <A
title="Show items starting with O" href="javascript:myfilter.set('^O')">O</A> <A
title="Show items starting with P" href="javascript:myfilter.set('^P')">P</A> <A
title="Show items starting with Q" href="javascript:myfilter.set('^Q')">Q</A> <A
title="Show items starting with R" href="javascript:myfilter.set('^R')">R</A> <A
title="Show items starting with S" href="javascript:myfilter.set('^S')">S</A> <A
title="Show items starting with T" href="javascript:myfilter.set('^T')">T</A> <A
title="Show items starting with U" href="javascript:myfilter.set('^U')">U</A> <A
title="Show items starting with V" href="javascript:myfilter.set('^V')">V</A> <A
title="Show items starting with W" href="javascript:myfilter.set('^W')">W</A> <A
title="Show items starting with X" href="javascript:myfilter.set('^X')">X</A> <A
title="Show items starting with Y" href="javascript:myfilter.set('^Y')">Y</A> <A
title="Show items starting with Z" href="javascript:myfilter.set('^Z')">Z</A>
</P></FORM></BODY></HTML>⌨️ 快捷键说明
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