带加号的按钮的唯一名称 - 想要单击此按钮

The code is:

代码是:

<button class="btn btn-default btn-xs" style="padding:0 5px" id="addPiidRelatedNumberBtn_332741000" ng-click="AddPiidRelatedNumber($event)" ng-show="EnableEditable &amp;&amp; CanEdit">
<span class="glyphicon glyphicon-plus" title="Add New Related Number"></span>
<button class="btn btn-de