JS选择select1.selectIndexselect idopSoption value1 a/optionoption value2 b/option
JS选择select
1.selectIndex
<select id="opS"><option value="1"> a</option><option value="2"> b</option><option value="3"> c</option></select><script>$("opS").selectIndex = 3; //选择 c</script>?