<script language="javascript">
function Test()
{
var s=document.getElementById("test");
var LastSelectedIndex=-1;
for(var i=0;i<s.options.length;i++)
{
if(s.options[i].selected)
LastSelectedIndex=i;
}
if(LastSelectedIndex!=-1)
alert(s.options[LastSelectedIndex].value);
}
</script>
<select id="test" multiple="multiple">
<option>请选择菜单</option>
<option value="test1">test1</option>
<option value="test2">test2</option>
<option value="test3">test3</option>
<option value="test4">test4</option>
</select>
<input type="button" value="Test" onclick="Test()"/>
function Test()
{
var s=document.getElementById("test");
var LastSelectedIndex=-1;
for(var i=0;i<s.options.length;i++)
{
if(s.options[i].selected)
LastSelectedIndex=i;
}
if(LastSelectedIndex!=-1)
alert(s.options[LastSelectedIndex].value);
}
</script>
<select id="test" multiple="multiple">
<option>请选择菜单</option>
<option value="test1">test1</option>
<option value="test2">test2</option>
<option value="test3">test3</option>
<option value="test4">test4</option>
</select>
<input type="button" value="Test" onclick="Test()"/>
<select id="sl">
<option>aaa</option>
<option>bbb</option>
<option>ccc</option>
</select>
<script>
alert(sl.options[sl.options.length-1].text)
</script>
chk.onselect = function(){
if(this.selected)
lastSelected = this.value;
}
btn.onselect = function(){
return lastSelected;
}
這樣可以嗎?
<html>
<head>
<meta http-equiv="Content-Type" content="text/html" />
<script language="JavaScript" type="text/javascript">
var lastSelected="no select";
window.onload=function(){
var chks = document.getElementsByName('d');
for(var i=0;i<chks.length;i++){
chks[i].onclick=trackSelect;
}
}
function trackSelect(){
if(this.checked) lastSelected=this.value;
}
function getSelect(){
var lb=document.getElementById('lastSelected');
lb.innerHTML=lastSelected;
}
</script>
</head>
<body>
<input id="1" type="checkbox" value="dd1" name="d" />chk1
<input id="2" type="checkbox" value="dd2" name="d" />chk2
<input id="3" type="checkbox" value="dd3" name="d" />chk3
<input id="4" type="checkbox" value="dd4" name="d" />chk4
<button onclick="getSelect();"></button>
<label id="lastSelected"></label>
</body>
</html>
這樣可以
<html>
<body>
<form name="f1">
<input type="checkbox" value="狗1" onclick="a(this)">狗1<br>
<input type="checkbox" value="狗2" onclick="a(this)">狗2<br>
<input type="checkbox" value="狗3" onclick="a(this)">狗3<br>
<input type="checkbox" value="狗4" onclick="a(this)">狗4<br>
<input type="checkbox" value="狗5" onclick="a(this)">狗5<br>
<input type="checkbox" value="狗6" onclick="a(this)">狗6<br>
<input type="checkbox" value="狗7" onclick="a(this)">狗7<br>
<input type="checkbox" value="狗8" onclick="a(this)">狗8<br>
<input type="button" value="告诉我最后一项" onclick="b()"><input type="text" name="t1" size="20">
</form>
<script>
Array.prototype.indexOf=function(substr,start){
var ta,rt,d='\0';
if(start!=null){ta=this.slice(start);rt=start;}else{ta=this;rt=0;}
var str=d+ta.join(d)+d,t=str.indexOf(d+substr+d);
if(t==-1)return -1;rt+=str.slice(0,t).replace(/[^\0]/g,'').length;
return rt;
}
var x = [];
function a(obj){
if (obj.checked){
x.push(obj.value);
}
else{
x.splice(x.indexOf(obj.value),1);
}
}
function b(){
if(x[x.length-1] != undefined){
document.f1.t1.value = x[x.length-1];
}
else{
document.f1.t1.value = "用户没有选择";
}
}
</script>
</body>
</html>
楼上的激动了..多选框到底是checkbox还是select multiple="multiple",有点混了.哈哈~~
<form>
<input type="checkbox" name="cb" value="1">Checkbox 1</input>
<input type="checkbox" name="cb" value="2">Checkbox 2</input>
<input type="checkbox" name="cb" value="3">Checkbox 3</input>
<input type="checkbox" name="cb" value="4">Checkbox 4</input>
<input type="checkbox" name="cb" value="5">Checkbox 5</input>
<input type="checkbox" name="cb" value="6">Checkbox 6</input><br/>
Last one: <input type="text" name="lbl" readonly/>
</form>
</body>
<script type="text/javascript">
var num_cbs=6;
var cb_show=function(){
var tmp="None";
for(var i=0;i<num_cbs;i++)
if(document.forms[0].cb[i].checked)
tmp=document.forms[0].cb[i].value;
document.forms[0].lbl.value=tmp;
}
for(var i=0;i<num_cbs;i++)
document.forms[0].cb[i].onclick=cb_show;
</script>
大家都是写代码的,干嘛说话这么冲,偶分多的是,你要是写对了,分都给你都没问题,像你这样题目都不看清楚就随便写代码来就说要给分才LJ。最后说下,大家贴出来的代码怎么都变成CheckBox了???我说的是多选框。
<select id="test" multiple="multiple" size="5">
<option>请选择菜单</option>
<option value="test1">test1</option>
<option value="test2">test2</option>
<option value="test3">test3</option>
<option value="test4">test4</option>
</select>多选的下拉框,比如用户多选了好几项,但是选择的顺序是1,3,2 那么最后选择的项是2,