fix regexp

@@ -312,22 +312,17 @@ var operationEdit={
         }
         var _g=this;
         var result=true;        
-        var msg;
         switch(_reqData["promotionType"]){
             case _g.config.Degressdiscount.enName:
-                var regrex=new RegExp("(\d+:\d+(\.\d+)?)(;\d+:\d+(\.\d+)?)*",'g');
+                var regrex=new RegExp(/(\d+:\d+(\.\d+)?)(;\d+:\d+(\.\d+)?)*/,'g');
                 var degress_discount_list=_reqData["data"]["degress_discount_list"];
                 result = regrex.test(degress_discount_list);                
-                if(!result){
-                    msg="";
-                }
                 break;
             case _g.config.SpecifiedAmount.enName:
-                var regrex=new RegExp("\d+:\d+(\.\d+)?",'g');
+                var regrex=new RegExp(/^\d+:\d+(\.\d+)?$/,'g');
                 var specified_amount_list=_reqData["data"]["specified_amount_list"];
                 result = regrex.test(specified_amount_list);
                 break;            
-            
         }        
         return result;
     }