comparison js/core.js @ 2694:1ccc083552d5

Minor fixed for AB

         this.state = "empty";
         this.XMLDOM = this.parent.document.createElement('page');
         this.XMLDOM.setAttribute('ref', specification.id);
         this.XMLDOM.setAttribute('presentedId', specification.presentedId);
         this.XMLDOM.setAttribute("state", this.state);
-        if (specification.preTest !== null) {
+        if (specification.preTest !== undefined) {
             this.preTest = new this.parent.surveyNode(this.parent, this.XMLDOM, this.specification.preTest);
         }
-        if (specification.postTest !== null) {
+        if (specification.postTest !== undefined) {
             this.postTest = new this.parent.surveyNode(this.parent, this.XMLDOM, this.specification.postTest);
         }
 
         // Add any page metrics
         var page_metric = this.parent.document.createElement('metric');