Sharepoint people picker Validation

Sharepoint People picker validation in javascript

var validatorId = 'validator ID';
        var textboxId = validatorId.replace('val_pck', 'txt_pck');
         var pickerId = validatorId.replace('val_pck', 'pck');
         var pickerValue = $("#" + pickerId).html();
         if (pickerValue == "" || pickerValue.indexOf('title') == -1 || $("

" + pickerValue + "

").find("#divEntityData").length == 0)
         {
          alert('invalid');
         }

set the value of people picker

var pickerKey = $("

"

 + pickerValue + "

").find("#divEntityData").attr("key");
if (args.IsValid && $('#' + textboxId)) $('#' + textboxId).val(pickerKey);