相关option分组产生层级,对最终用户来说可能没有什么意义,但是对于制作者来说,option分组可以提供很多方便。
相关属性:
1. title 标题,通常这种标题无法被显示
示例:
<card> <p> what os you use now? <select name="os"> <optgroup title="microsoft"> <option value="dos">dos</option> <option value="windows">windows</option> </optgroup> <optgroup title="others"> <option value="unix">unix</option> <option value="linux">linux</option> </optgroup> </select> </p> </card>
上例演示了一个基本的optgroup元素的应用,由于optgroup没有变量参数,所以只能提供有限的应用。
一个比较复杂的例子:
<?xml version="1.0"?> <!doctype wml public "-//wapforum//dtd wml 1.1//en" "http://www./dtd/wml_1.1.xml"> <wml>
<template> <do type="options" label="back"> <prev/> </do> </template>
<card id="lists"> <p> <select title="pick lists"> <option onpick="#jy">jin yong</option> <option onpick="#gl">gu long</option> </select> </p> </card>
<card id="jy"> <onevent type="onenterbackward"> <prev/> </onevent> <do type="accept"> <go href="#display_fav"/> </do> <p> pick your fav book: <select name="fav" title="stooges"> <option value="xiao">xiao ao jiang hu</option> <option value="she">she diao ying xiong</option> <option value="lu">lu ding ji</option> <option value="shen">shen diao xia lv</option> </select> </p> </card>
<card id="gl"> <onevent type="onenterbackward"> <prev/> </onevent> <do type="accept"> <go href="#display_fav"/> </do> <p> pick your fav book. <select multiple="true" title="gu long" name="fav" > <option value="gu">gu xing zhuan</option> <option value="da">da di fei ying</option> <option value="tian">tian ya ming yue dao</option> <option value="feng">lu xiao feng</option> </select> </p> </card>
<card id="display_fav"> <p> your fav was $fav. </p> </card> </wml>
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