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#pokeball {
	position:relative;
   width: 400px; 
   height: 400px;
   margin:10% auto; 
   background: #CA0601;  
   border-radius: 50%;
  box-shadow:inset -1px 1px 2px #F74339,
  inset -15px 5px 2px #FDE0DF,
  inset 0px -115px 2px #CCCDD5;

UltCombo

/**
 * clown test only one div - JV
 */

body{background: white;}

span{ cursor:none; outline:0; color:white; text-align:center;display:block; width:80px; height:80px; position:relative; top:178px; margin:0 auto; background:transparent; z-index:1;}
	
div{
  width:75px;

UltCombo

/**
 * teste transform 3d
 */
 
#container{
	position:relative;
	margin:100px auto;
	width:200px;	
	height:200px;
	border:solid;

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/**
 * teste transform 3d
 */
 
#container{
	position:relative;
	margin:100px auto;
	width:200px;	
	height:200px;
	transform:perspective(500);

UltCombo

<input type="checkbox"><button>Clique para alternar estado do checkbox</button>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script>
$('button').click(function() {
    $('input')[0].checked ^= 1;
});
</script>

UltCombo

$('input')[0].checked ^= 1; //referência à prop checked do elemento input
inputElRef.checked = false ^ 1; //conversão implícita ToNumber
inputElRef.checked = 0 ^ 1; //bits diferentes, XOR retorna 1
inputElRef.checked = 1; //conversão implícita ToBoolean
inputElRef.checked = true;

UltCombo

[] == false //ToPrimitive deste array retorna string vazia
"" == false //comparação com boolean converte booleano ToNumber
"" == 0 //comparação de string com número converte string ToNumber
0 == 0
true

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>>> 1 == true
<<< true
>>> 0 == false
<<< true

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<<< +true
>>> 1
<<< +false
<<< 0
>>> !!1
<<< true
>>> !!0
<<< false

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^ | 0 1
--+-----
0 | 0 1
1 | 1 0