A working JSFIDDLE
You can do something like this:
var y = [1, 2, 2, 3, 2]
var removeItem = 2;
y = jQuery.grep(y, function(value) {
return value != removeItem;
});
Result:
[1, 3]
http://snipplr.com/view/14381/remove-item-from-array-with-jquery/