TypeError: undefined is not an object - Safari & IE
27606
Detecting an undefined object property
131788
Uncaught TypeError: Illegal invocation in javascript
86651
How to determine if Javascript object is an event?
84421
variable === undefined vs. typeof variable === "undefined"
132521
TypeError: $ is not a function when calling jQuery function
33170
How to getElementByClass instead of GetElementById with JavaScript?
155435
JSON object undefined in Internet Explorer 8
85118
What happens with event handlers when an object goes out of scope?
22311
How to validate that an object (whose locator we don't know since it is not present) is not present in a page
125262
focus() not working in safari or chrome
63663
Passing window and undefined to an immediately invoked anonymous function. Why?
66270
"getElementById not a function" when trying to parse an AJAX response?
88022
How to convert an "object" into a function in JavaScript?
36106
Jquery - IE not implemented error (in IE 8)
10857
getElementsByClassName produces error "undefined"
96728
Is there a way to enable the JavaScript Error/Debug Console for Safari within Android?
40674
What is the difference between null and undefined in JavaScript?