Possible Duplicates:
Difference between == and === in JavaScript
Javascript === vs == : Does it matter which “equal” operator I use?
What's the difference between ==
and ===
? Also between !==
and !==
?
There are lots of answers to this question on Stackoverflow already.
Short:
==
only compares values
===
compares values + type
var check1 = '10',
check2 = 10;
check1 == check2 // true
check1 === check2 // false