无勾选，不提示

src/main/webapp/static/js/analysis/special_analysis.js

@@ -142,7 +142,7 @@ function itemCheck(o){
 		productTypeList.push(type);
 		productNameList.push(data[1]);
 	});
-	if((new Set(productTypeList)).size != 1){
+	if(productTypeList.length > 0 && (new Set(productTypeList)).size != 1){
         alert("请选择同是产品或栏目对标分析。");
         $(o).attr("checked", false);
 		$.checkbox();
@@ -175,7 +175,7 @@ function setBenchmark(){
 	    productTypeList.push(type);
 		productNameList.push(data[1]);
 	});
-	if((new Set(productTypeList)).size != 1){
+	if(productTypeList.length > 0 && (new Set(productTypeList)).size != 1){
         alert("请选择同是产品或栏目对标分析。");
 		return false;
     }