placeholder for invoice title

@@ -13,6 +13,8 @@ var $invoiceContent = $('#invoice-content');
 
 var $invoiceTitleInput;
 
+require('yoho-jquery-placeholder');
+
 // 发票信息验证
 function validateInvoice($el) {
     var pass = true;
@@ -137,6 +139,9 @@ function showInvoiceDialog() {
         }
     });
 
+    // placeholder for title
+    $('.invoice-title-input').placeholder();
+
     dialog.show();
 }