如何获取下面表单select域的选择部分的文本,其中obj=document.getElemById(“obj”)
<form name="a"> <select name="a" size="1" id=”obj”> <option value="a">1</option> <option value="b">2</option> <option value="c">3</option> </select> </form>
<form name="a"> <select name="a" size="1" id=”obj”> <option value="a">1</option> <option value="b">2</option> <option value="c">3</option> </select> </form>
obj.options[obj.selectedIndex].text
obj.options[obj.selectedIndex].value
obj. value
obj.text
<select name="a" size="1" id=”obj”>
<option value="a">1</option>
<option value="b">2</option>
<option value="c">3</option>
</select>
</form>