将今天的日期与日历日期进行比较（仅限接下来的 7 天，否则生成警报）[关闭]

我必须将今天的日期与日历日期进行比较（使用日期选择器ajax的选择器日期）。 如果日期差异超过 7 天，则生成警报。

        var mydate = new Date();//Todays date
        var theyear = mydate.getFullYear();
        var themonth = mydate.getMonth() + 1;
        var thetoday = mydate.getDate();

        txtDate.value='04-Jul-2012';//date picker date in this format

var mydate = new Date(); //Todays date
txtDate.value='16-Jul-2012'; //date picker date in this format

var newDate = new Date(txtDate.value); //make date object

var difference = Math.ceil((newDate-mydate) / (60*60*24*1000)); //calculate days

if (difference > 7) alert('more than 7 days');

FIDDLE http://jsfiddle.net/7y9XU/