js和Jquery获取选中select值和文本

JS:

<body>
<select name="PaymentType" style="width:110px" > 
<option value="">请选择 </option> 
<option value="001">月付</option> 
<option value="002">半年付</option> 
<option value="003">年付</option> 
</select> 
<script language="javascript">
function Gettext(obj){
var txt=obj.options[obj.options.selectedIndex].text;
alert(txt)
}
function Getvaule(obj){
var val=obj.options[obj.options.selectedIndex].value;
alert(val)
}
</script>
</body>

jQuery:

<body>
<select name="PaymentType" style="width:110px" > 
<option value="">请选择 </option> 
<option value="001">月付</option> 
<option value="002">半年付</option> 
<option value="003">年付</option> 
</select> 
<script language="javascript">
function Gettext(obj){
var txt=$(obj).find("option:selected").text();
alert(txt)
}
function Getvaule(obj){
var val=$(obj).find("option:selected").val();
alert(val)
}
</script>
</body>