JS文件包含参考：

<script src="~/Scripts/scriptname.js" type="text/javascript"></script>

JS文件内容：

$("[id*='txtAddress1S']")
  .blur(function(){
   $("[id*='txtAddress1S']")
      .val().match(
          /\b[p]*(ost)*\.*\s*[o|0]*(ffice)*\.*\s*b[o|0]x\b/i)&&
         (alert("Packages are not deliverable to a Post Office Box.
         \nPlease provide a different shipping address."),$("[id*='txtAddress1S']").focus())
  });

提前致谢！