var nums = new Array();
nums[0] = "cero";
nums[1] = "uno";

var nums = new Array("cero", "uno");

var nums = ["cero", "uno"];

> '' == '0'
false
> '' == 0
true
> 0 == '0'
true

> '  \t\r\n  ' == 0
true

> false  === ''
false
> false == ''
true

> 10 == '10'
true
> 10 === '10'
false