Index: ssts-web/src/main/webapp/js/common.js
===================================================================
diff -u -r33614 -r33667
--- ssts-web/src/main/webapp/js/common.js	(.../common.js)	(revision 33614)
+++ ssts-web/src/main/webapp/js/common.js	(.../common.js)	(revision 33667)
@@ -2657,7 +2657,7 @@
     if (typeof (value) == 'undefined') {
         return true;
     }
-    if (value == null) {
+    if (value == null || value == 'null') {
         return true;
     }
     if (value == '') {
Index: ssts-web/src/main/webapp/disinfectsystem/print/print.js
===================================================================
diff -u -r33523 -r33667
--- ssts-web/src/main/webapp/disinfectsystem/print/print.js	(.../print.js)	(revision 33523)
+++ ssts-web/src/main/webapp/disinfectsystem/print/print.js	(.../print.js)	(revision 33667)
@@ -1338,10 +1338,12 @@
 function CreateOneFormPage(barcode,name,unitName) {
 	doGetLodop();
 	var tableHtml ="<table border ='0' style=\"width: 50mm; height: 30mm\">";
-	tableHtml += "<tr height='5mm'>";
-	tableHtml += "<td colspan='4' style='font-size: 14px;'><center>"+unitName+"</center>";
-	tableHtml += "</td>";
-	tableHtml += "</tr>";
+	if(!isUndefinedOrNullOrEmpty(unitName)){
+		tableHtml += "<tr height='5mm'>";
+		tableHtml += "<td colspan='4' style='font-size: 14px;'><center>"+unitName+"</center>";
+		tableHtml += "</td>";
+		tableHtml += "</tr>";
+	}
 	
 	tableHtml += "<tr>";
 	tableHtml += "<td colspan='2' style='font-size: 16px;' align='center'>"+name+"</td>";