Index: ssts-web/src/main/webapp/disinfectsystem/videoMonitor/common/heartbeatRequestCommon.js
===================================================================
diff -u -r30976 -r31030
--- ssts-web/src/main/webapp/disinfectsystem/videoMonitor/common/heartbeatRequestCommon.js	(.../heartbeatRequestCommon.js)	(revision 30976)
+++ ssts-web/src/main/webapp/disinfectsystem/videoMonitor/common/heartbeatRequestCommon.js	(.../heartbeatRequestCommon.js)	(revision 31030)
@@ -58,9 +58,9 @@
 		//heartbeatRequest(true);
 	});*/
 
-	window.addEventListener("beforeunload" , function(event){
+	window.onbeforeunload = function(event){
 		heartbeatRequest(true);
-	});
+	};
 	//定时发起心跳请求
 	heartbeatRequest(false);
 }