问具有正确验证的同一页面上的多个日期范围下次不会选择日期范围

EN

// example by using on change event
$('input.datepicker').on('change',function(){
    var inputs=$('input.datepicker').not(this), // get all input which are datepickers
        current_value=this.value, // get date from active input
        flagDate=false; // let the date is not taken previously
    inputs.each(function(){
       if(current_value==this.value){
            flagDate = true; // date is taken in previous fields
            return false;// break the loop
       }
       if(flagDate){
            alert('This date is already taken, please choose another one.');
       }
    });
});