fixbugs

stmms-web/src/main/webapp/WEB-INF/views/modules/exam/groupAdd.jsp

@@ -29,9 +29,9 @@
 				if ($("#openDouble").is(':checked')){
 					$(".doubleDiv").show();
 				}else{
+					$("#doubleRate").attr("value","");
+					$("#arbitrateThreshold").attr("value","");
 					$(".doubleDiv").hide();
-					$("#doubleRate").value = null;
-					$("#arbitrateThreshold").value = null;
 				}
 			});
 		});

stmms-web/src/main/webapp/WEB-INF/views/modules/exam/groupEditFull.jsp

@@ -31,18 +31,18 @@
 				$("#openDouble").attr("disabled","disabled");
 				$(".doubleDiv").show();
 			}else{
+				$("#doubleRate").attr("value","");
+				$("#arbitrateThreshold").attr("value","");
 				$(".doubleDiv").hide();
-				$("#doubleRate").value = null;
-				$("#arbitrateThreshold").value = null;
 			}
 			
 			$("#openDouble").change(function() { 
 				if ($("#openDouble").is(':checked')){
 					$(".doubleDiv").show();
 				}else{
+					$("#doubleRate").attr("value","");
+					$("#arbitrateThreshold").attr("value","");
 					$(".doubleDiv").hide();
-					$("#doubleRate").value = null;
-					$("#arbitrateThreshold").value = null;
 				}
 
 			});

stmms-web/src/main/webapp/WEB-INF/views/modules/exam/groupEditSimple.jsp

@@ -32,18 +32,18 @@
 				$("#openDouble").attr("disabled","disabled");
 				$(".doubleDiv").show();
 			}else{
+				$("#doubleRate").attr("value","");
+				$("#arbitrateThreshold").attr("value","");
 				$(".doubleDiv").hide();
-				$("#doubleRate").value = null;
-				$("#arbitrateThreshold").value = null;
 			}
 			
 			$("#openDouble").change(function() { 
 				if ($("#openDouble").is(':checked')){
 					$(".doubleDiv").show();
 				}else{
+					$("#doubleRate").attr("value","");
+					$("#arbitrateThreshold").attr("value","");
 					$(".doubleDiv").hide();
-					$("#doubleRate").value = null;
-					$("#arbitrateThreshold").value = null;
 				}
 
 			});