Question

If the option value and previous matches it won’t display in that drop down using jquery

Edit

Populating the selectbox based on user’s comment

$.each(g_Vehicle, function (index) { 
     var iYear = g_Vehicle[index].Year;
     sMake = g_Vehicle[index].Make;
            selectYear = '<option value="' + iYear + '">' + iYear + '</option>'; selectMake =   '<option value="' + sMake + '">' + sMake + '</option>'; 
     $("#DropDown_Year").append(selectYear);    
     $("#DropDown_Make").append(selectMake); 
});

Answer 1

    $(document).ready(function(){ 
$('body').delegate('#DropDown_Year','change',function(){
var prev = $(this).find('option:selected').prev().val();

  if($(this).val() ==  prev ){ 
    alert('Matched');
     //your curent value and previous value are the same
  }else{
    //not same
  }


 });
});