last.html
var change = function ()
{
var a = document.getElementById ('a');
a.value = 'apple';
for ( var i = 0; i < a.children.length; i++)
{
var ac = a.children[i];
if (!!ac.getAttribute ('selected'))
{
ac.removeAttribute ('selected');
}
if (ac.value == 'apple')
{
ac.setAttribute ('selected', 'selected');
}
}
}
苹果
橘子
雪梨
