我在jQuery中有一个函数，它不能按预期工作

Question

function hideShowTextBox(tabName, index, tabContainer) {
  var tabIndex = index + 1;
  var dropDownId = tabContainer + '_' + tabName + '_IncomeDetails' + tabIndex + '_dpEmploymentStatus';

  //this line gives a blank value..What may be the problem???
  alert($(dropDownId + ' option:selected').text()); 
}

Answer 1

ID选择器必须以#字符开头，例如#foo。尝试：

var dropDownId = '#' + tabContainer + '_' + tabName + '_IncomeDetails' + tabIndex + '_dpEmploymentStatus';