- JavaScript选择对象:Select
form |
该对象所在的表单 |
name |
该对象的name属性 |
length |
选项的数目 |
options |
<option>标记 |
selectedIndex |
所选项目的索引值 |
type |
该对象的type属性 |
blur() |
|
focus() |
|
handleEvent(事件) |
|
onBlur onClick onChange onFocus onKeyDown onKeyPress onKeyUp
onMouseDown onMouseUp onMouseOver onMouseOut onMouseMove
- 选项对象:选择对象的子对象:option
<option value="值" selected>文字</option>
new Option([文字[,值[,defaultSelected[,selected]]]])
selected |
判断该选项是否被选取 |
defaultSelected |
指定该选项为默认选定状态 |
index |
所有选项所构成的数组索引值 |
length |
选项的数目 |
text |
该选项显示的文字 |
value |
所选项传到服务器的值 |
<Script>
var url = new Array(3);
url[0] = "http://www.yam.org.tw/";
url[1] = "http://www.kimo.com/";
url[2] = "http://chinese.yahoo.com/";
function goto(form) {
var i = form.menu.selectedIndex;
if (i>0) {
location = url[i-1];
}
}
</Script>
<FORM>
<SELECT NAME="menu" onChange="goto(this.form)">
<OPTION>你喜欢哪一个搜索引擎?
<OPTION STYLE="color:red">◆蕃薯藤
<OPTION STYLE="color:red">◇奇摩
<OPTION STYLE="color:red">◆中文雅虎
</SELECT>
</FORM>
<Script>
function getText() {
sel = document.forms[0].weekday
ans = sel.options[sel.selectedIndex].text
return ans;
}
</Script>
<FORM>请选择...
<SELECT name=weekday>
<OPTION VALUE="Monday">星期一
<OPTION VALUE="Tuesday">星期二
<OPTION VALUE="Wednesday">星期三
<OPTION VALUE="Thursday">星期四
<OPTION VALUE="Friday">星期五
<OPTION VALUE="Saturday">星期六
<OPTION VALUE="Sunday">星期日
</SELECT><P>
<INPUT TYPE="button" VALUE="取出选项的文字"
onClick="alert(getText())">
<INPUT TYPE="button" VALUE="取出选项的值"
onClick="alert(this.form.weekday.value)"><BR>
</FORM>
<FORM NAME="form1">
你最喜欢哪一种水果?
<INPUT TYPE="text" NAME="fruit">
<A HREF="#"
onClick="javascript:open('1.htm','','width=100')">
查询</A>
</FORM>
<Script> /* -------- 1.htm -------- */
function choice() {
sel = document.forms[0].elements[0];
document.form1.fruit.value =
sel.options[sel.selectedIndex].text;
self.close();
}
</Script>
<FORM>
<SELECT onChange="choice()">
<OPTION>请选择
<OPTION>西瓜
<OPTION>香蕉
</SELECT>
</FORM>
<Script>
function createOptions(){
var option = new Option(document.form1.select1.value)
document.form1.select2.options[2] = option;
}
</script>
<form name="form1">
<select name="select1" size="10">
<option>可选择项目 <option>---------------
<option value="香蕉">香蕉 <option value="葡萄">葡萄
<option value="苹果">苹果 <option value="梨子">梨子
</select>
<input type="button" value="-->" onClick="createOptions()">
<select name="select2" size="10">
<option>选择项目 <option>---------------
</select>
</form>
<Script>
function createOptions(){
sel1 = document.form1.select1;
sel2 = document.form1.select2;
var num = sel1.selectedIndex;
var option = new Option(sel1.options[num].text);
sel2.options[2] = option;
}
</script>
<form name="form1">
<select name="select1" size="10">
<option>可选择项目 <option>---------------
<option value="香蕉">香蕉 <option value="葡萄">葡萄
<option value="苹果">苹果 <option value="梨子">梨子
</select>
<input type="button" value="-->" onClick="createOptions()">
<select name="select2" size="10">
<option>选择项目 <option>---------------
</select>
</form>
<Script>
function createOptions(){
sel1 = document.form1.select1;
sel2 = document.form1.select2;
var num = sel1.selectedIndex;
var option = new Option(sel1.options[num].text);
var item = sel2.options.length;
sel2.options[item] = option;
}
</script>
<form name="form1">
<select name="select1" size="10">
<option>可选择项目 <option>---------------
<option value="香蕉">香蕉 <option value="葡萄">葡萄
<option value="苹果">苹果 <option value="梨子">梨子
</select>
<input type="button" value="-->" onClick="createOptions()">
<select name="select2" size="10">
<option>选择项目 <option>---------------
</select>
</form>
<Script>
function createOptions(){
sel1 = document.form1.select1;
sel2 = document.form1.select2;
var num = sel1.selectedIndex;
if (num > 1) {
var option = new Option(sel1.options[num].text);
var item = sel2.options.length;
sel2.options[item] = option;
}
sel1.selectedIndex = 10000;
}
function delOptions() {
var num = document.form1.select2.selectedIndex;
if (num>1)
document.form1.select2.options[num] = null;
else
document.form1.select2.selectedIndex = 10000;
}
</script>
<form name="form1">
<select name="select1" size="10"
onDblClick="createOptions()">
<option>可选择项目 <option>---------------
<option value="香蕉">香蕉 <option value="葡萄">葡萄
<option value="苹果">苹果 <option value="梨子">梨子
</select>
<input type="button" value="选择" onClick="createOptions()">
<select name="select2" size="10">
<option>选择项目 <option>---------------
</select>
<input type="button" value="删除" onClick="delOptions()">
</form>