Use:

alert($( "#target option:first" ).text());

另一种重置值(对于多个选定元素)的方法是:

$("selector").each(function(){

    /*Perform any check and validation if needed for each item */

    /*Use "this" to handle the element in javascript or "$(this)" to handle the element with jquery */

    this.selectedIndex=0;

});

以下是我的做法:

$("#target option")
    .removeAttr('selected')
    .find(':first')     // You can also use .find('[value=MyVal]')
        .attr('selected','selected');

$('#newType option:first').prop('selected', true);

Use:

alert($( "#target option:first" ).text());

就像这样简单:

$('#target option:first').prop('selected', true);