语法：向一个下拉框添加属性
document.getElementById("ddlControl").options.add(new?Option(text,value));
<script language="javascript" type="text/javascript">
//添加下拉框选项
function addOption()
{
var obj=document.getElementById('year');
for(var i=1961;i<=2061;i++)
obj.options.add(new Option(i+"年",i));
}
//下拉框选项默认为当前系统年
function setYear()
{
var obj=document.getElementById('year');
var data=new Date();
var year=data.getFullYear();
for(var i=0;i<=100;i++)
{
if(obj.options[i].value == year)
{
obj.options[i].selected=true;
return;
}
}
}
</script>
<body>
//先有下拉框
<select name="year" id="year">
</select>
<script language="javascript" type="text/javascript">
addOption();
setYear();
</script>
</body>
?
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