jQuery Datepicker将默认日期设置为“当前月份，当前日期，（当前年份-18）”(jQuery Datepicker Set Default Date to “current month, current day, (current year-18)”)

 我有一个jQuery datepicker。 我想将默认日期设置为“当前月份，当前日期，（当前年份-18）”但我在设置defaultDate属性时遇到问题。 显示的默认年份是1920年，据说是1995年。任何人都可以帮忙吗？ 
 
 我的代码： 
 
 HTML 
 
<input type="text" class="datepicker minimumSize" name="BirthDate" id="BirthDate"  readonly="readonly"/>
 
 JavaScript的 
 
var d = new Date();
var year = d.getFullYear() - 18;
$('#BirthDate').datepicker({ changeYear: true, changeMonth: true, yearRange: '1920:' + year + '', defaultDate: d.getMonth()+d.getDay()+year});
 
 JSFiddle http://jsfiddle.net/jobzky/zg8Le/ 

I have a jQuery datepicker. I want to set the default date to "current month, current day, (current year-18)" but I have issue when I set the defaultDate property. The default year displayed is 1920 which is supposedly 1995. Can anyone help?
 
My code:
 
HTML
 
<input type="text" class="datepicker minimumSize" name="BirthDate" id="BirthDate"  readonly="readonly"/>
 
JavaScript 
 
var d = new Date();
var year = d.getFullYear() - 18;
$('#BirthDate').datepicker({ changeYear: true, changeMonth: true, yearRange: '1920:' + year + '', defaultDate: d.getMonth()+d.getDay()+year});
 
JSFiddle http://jsfiddle.net/jobzky/zg8Le/

原文：