应该在onChange事件中写
var obj = document.getElements("selectname")[0];
var thisform = document.forms[0];
thisfrom.textfield.value = obj.options[obj.selectedIndex].value;
//如果你想到显示在下拉框中的文本:
thisfrom.textfield.value = obj.options[obj.selectedIndex].text;
var obj = document.getElements("selectname")[0];
var thisform = document.forms[0];
thisfrom.textfield.value = obj.options[obj.selectedIndex].value;
//如果你想到显示在下拉框中的文本:
thisfrom.textfield.value = obj.options[obj.selectedIndex].text;
<SCRIPT language="JavaScript">
function getValue()
{
nameList=document.form1.namelist;
for(var i=0;i<nameList.length;i++)
{
if(nameList.options[i].selected)
document.form1.name.value=nameList.options[i].value;
}
}
</SCRIPT>