netteForms.js: removed support for IE 7, typo

Author: dg

src/assets/netteForms.js

@@ -474,11 +474,9 @@ Nette.toggleControl = function(elem, rules, success, firsttime, value) {
 
 
 Nette.parseJSON = function(s) {
-	s = s || '[]';
-	if (s.substr(0, 3) === '{op') {
-		return eval('[' + s + ']'); // backward compatibility
-	}
-	return window.JSON && window.JSON.parse ? JSON.parse(s) : eval(s);
+	return (s || '').substr(0, 3) === '{op'
+		? eval('[' + s + ']') // backward compatibility with Nette 2.0.x
+		: JSON.parse(s || '[]');
 };
 
 
@@ -546,6 +544,10 @@ Nette.inArray = function(arr, val) {
 
 
 Nette.addEvent(window, 'load', function() {
+	if (!window.JSON || !window.JSON.parse) {
+		return;
+	}
+
 	for (var i = 0; i < document.forms.length; i++) {
 		Nette.initForm(document.forms[i]);
 	}