<select name="LA" >
<option value="化妆品" >化妆品</option>
<option value="家电">家电</option>
<option value="礼品">礼品</option>
<option value="数码产品">数码产品</option>
</select>
<script>
LA.selectedIndex=3
</script>
<option value="化妆品" >化妆品</option>
<option value="家电">家电</option>
<option value="礼品">礼品</option>
<option value="数码产品">数码产品</option>
</select>
<script>
LA.selectedIndex=3
</script>
{
for (var i=0;document.main.LA.options.length;i++)
{
if(document.main.LA.options[i].value=="礼品")
{
document.main.LA.selectedIndex=i;
}
}
}<body onLoad="myselect();">