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select中添加、修改、删除option元素

2007-11-10 12:38 323 查看
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">

<html>

<head>

<title>javascript select options text value</title>

<meta name="keywords" content="javascript select options text value add modify delete set">

<meta name="description" content="javascript select options text value add modify delete set">

<script language="javascript">

<!--

// Author: i@lxl.cn

// Modify: i@cnlei.com

function watch_ini(){ // 初始

for(var i=0; i<arguments.length; i++){

var oOption=new Option(arguments[i],arguments[i]);

document.getElementById("MySelect").options[i]=oOption;

}

}

function watch_add(f){ // 增加

var oOption=new Option(f.word.value,f.word.value);

f.keywords.options[f.keywords.length]=oOption;

}

function watch_sel(f){ // 编辑

f.word.value = f.keywords.options[f.keywords.selectedIndex].text;

}

function watch_mod(f){ // 修改

f.keywords.options[f.keywords.selectedIndex].text = f.word.value;

}

function watch_del(f){ // 删除

f.keywords.options.remove(f.keywords.selectedIndex);

}

function watch_set(f){ // 保存

var set = "";

for(var i=0; i<f.keywords.length; i++){

set += f.keywords.options[i].text + ";";

}

confirm(set);

}

//-->

</script>

</head>

<body>

<form name="watch" method="post" action="">

<select id="MySelect" name="keywords" size="10" onchange="watch_sel(this.form)"></select><br>

<script language="javascript">

<!--

watch_ini("我","你","?","他","她","它","尔"); // 初始关键词

//-->

</script>

<input type="text" name="word" /><br />

<input type="button" value="增加" onclick="watch_add(this.form);" />

<input type="button" value="修改" onclick="watch_mod(this.form);" />

<input type="button" value="删除" onclick="watch_del(this.form);" />

<input type="button" value="保存" onclick="watch_set(this.form);" />

</form>

</body>

</html>
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