javascript 实现break

判断一个select控件中是否含有某个值 

           var rightSel = $('#' + select_id);   // select_id是变量，代表select的id

   function test(data){                var success = false;         var t = '#' + rightSel.attr("id");var existOptText = "";                    existOptText = $(t + " option").each(function() {                      if ($(this).text() == data) {                         success = true;                        return false;                    }                 });                return success ;             } 

使用

   var exist = test(data[i]);  //alert(exist);  if (exist != true) {  // true 不加引号alert(1);  }