Index: ssts-web/src/main/webapp/homepage/portalPage.js
===================================================================
diff -u -r12331 -r12511
--- ssts-web/src/main/webapp/homepage/portalPage.js	(.../portalPage.js)	(revision 12331)
+++ ssts-web/src/main/webapp/homepage/portalPage.js	(.../portalPage.js)	(revision 12511)
@@ -657,7 +657,9 @@
 	$div.append($iframeContent);
 	$("#windowBox").append($div);*/
 }
-//tab 标签选择变化时发生
+/**
+ * tab 标签选择变化时发生，title为新tab的标题
+ */
 function onTabChange(title){
 	//控制红色数字提醒的显示和隐藏
 	if(title == personalDesktopTitle){
@@ -677,9 +679,9 @@
 	}
 	
 	//选择tab 则显示该tab所对应打开的页面，其他页面隐藏上一个页面
-	if(previousActiveTabTitle!=title){
+	if(currentActiveTabTitle!=title){
 		//隐藏上一个tab所对应的页面
-		var previousDivObj = getElementByTitle(previousActiveTabTitle);
+		var previousDivObj = getElementByTitle(currentActiveTabTitle);
 		if(previousDivObj != null){
 			previousDivObj.style.display = "none";
 		}
@@ -692,7 +694,7 @@
 				currentDivObj.style.display = "block";
 			}
 		}
-		previousActiveTabTitle = title;
+		currentActiveTabTitle = title;
 	}else{
 		var personalDesktopDiv = getElementByTitle(personalDesktopTitle);
 		if(personalDesktopDiv){
@@ -705,7 +707,7 @@
 				nextSiblingObj = nextSiblingObj.nextSibling;
 			}
 		}
-		previousActiveTabTitle = personalDesktopTitle;
+		currentActiveTabTitle = personalDesktopTitle;
 	}
 	closeMenus_box();
 }
@@ -1025,7 +1027,7 @@
 		url: WWWROOT+"/system/systemWarningAction!getSystemWarning.do",
 		success: function(response) {
 			var result = Ext4.decode(response.responseText);
-	    	if(result.success && result.data.length > 0){
+	    	if(result.success && result.data && result.data.length > 0){
 	    		if(isFirstOnLoad){
 	    			//设置提醒数字
 	    			var container = Ext4.getBody();