diff --git a/test/webscan/demo.html b/test/webscan/demo.html
index 6d6899d5..4ff9efc4 100644
--- a/test/webscan/demo.html
+++ b/test/webscan/demo.html
@@ -91,7 +91,7 @@
 		{
 			socket.send(JSON.stringify({
 				'Func':'GetDeviceList',
-				'arg':0
+				'arg':'0'
 			}));
 		}
 		
@@ -99,7 +99,7 @@
 		{
 			socket.send(JSON.stringify({
 				'Func':'SelectDevice',
-				'arg':0
+				'arg':'0'
 			}));
 		}
 		
@@ -107,7 +107,7 @@
 		{
 			socket.send(JSON.stringify({
 				'Func':'SetScanColorType',
-				'arg':3
+				'arg':'3'
 			}));
 		}
 		
@@ -115,7 +115,7 @@
 		{
 			socket.send(JSON.stringify({
 				'Func':'SetDPI',
-				'arg':200
+				'arg':'200'
 			}));
 		}
 		
@@ -123,7 +123,7 @@
 		{
 			socket.send(JSON.stringify({
 				'Func':'SetDuplex',
-				'arg':1
+				'arg':'1'
 			}));
 		}
 		
@@ -131,7 +131,7 @@
 		{
 			socket.send(JSON.stringify({
 				'Func':'SetScanJPGQuality',
-				'arg':60
+				'arg':'60'
 			}));
 		}
 		
@@ -139,7 +139,7 @@
 		{
 			socket.send(JSON.stringify({
 				'Func':'StartScan',
-				'arg':60
+				'arg':'60'
 			}));
 		}