fix checking for NaN value

Friedrich W. H. Kossebau · Friedrich W. H. Kossebau · commit a79eeac21875 · 2015-03-16T13:21:27.000+01:00
diff --git a/programs/viewer/viewer.js b/programs/viewer/viewer.js
@@ -259,7 +259,7 @@ function Viewer(viewerPlugin, parameters) {
 
     function readStartPageParameter(startPage) {
         var result = parseInt(startPage, 10);
-        return (result != NaN) ? result : 1;
+        return isNaN(result) ? 1 : result;
     }
 
     this.initialize = function () {

Original file line number	Diff line number	Diff line change
`@@ -259,7 +259,7 @@ function Viewer(viewerPlugin, parameters) {`
`259`	`259`
`260`	`260`	`function readStartPageParameter(startPage) {`
`261`	`261`	`var result = parseInt(startPage, 10);`
`262`		`- return (result != NaN) ? result : 1;`
	`262`	`+ return isNaN(result) ? 1 : result;`
`263`	`263`	`}`
`264`	`264`
`265`	`265`	`this.initialize = function () {`