for bug 35738 (sheet formula)

cell/model/FormulaObjects/informationFunctions.js

@@ -565,7 +565,7 @@
 	cSHEET.prototype.isXLFN = true;
 	cSHEET.prototype.Calculate = function (arg, opt_bbox, opt_defName, ws) {
 
-		var res;
+		var res = null;
 		if(0 === arg.length){
 			res = new cNumber(ws.nSheetId);
 		}else{
@@ -576,14 +576,24 @@
 				if(arg0.ws){
 					res = new cNumber(arg0.ws.nSheetId);
 				}else if(arg0.wsFrom){
-					var sheet1 = arg0.wsFrom.index;
-					var sheet2 = arg0.wsTo.index;
+					var sheet1 = arg0.wsFrom.nSheetId;
+					var sheet2 = arg0.wsTo.nSheetId;
 					res = new cNumber(Math.min(sheet1, sheet2));
+				}else if(cElementType.string === arg0.type){
+					var arg0Val = arg0.getValue();
+					var curWorksheet = ws.workbook.getWorksheetByName(arg0Val);
+					if(curWorksheet && undefined !== curWorksheet.nSheetId){
+						res = new cNumber(curWorksheet.nSheetId);
 					}
 				}
 			}
-		return this.value = res;
+		}
+
+		if(null === res){
+			res = new cError(cErrorType.wrong_value_type);
+		}
 
+		return this.value = res;
 	};
 
 	/**