Me conviene usar eval aca ?

[Calisco]

Creo que estas equivocado.

indexOf
This method is provided only for browsers without native indexOf support. For more info see http://developer.mozilla.org- /en- /docs- /Core_JavaScript_1.5_Reference:Global_Objects:Array :indexOf

indexOf compares a search element to elements of the Array using strict equality (the same method used by the ===, or triple-equals, operator).

Link indexOf de MooTools


Dice que el método indexOf sólo para aquellos exploradores que no lo soportan forma nativa. Lo hace con el uso de la función $native del core de mootools:

var $native = function()
Will add a .extend method to the objects passed as a parameter, but the property passed in will be copied to the object’s prototype only if non previously existent. Its handy if you dont want the .extend method of an object to overwrite existing methods. Used automatically in MooTools to implement Array/String/Function/Number methods to browser that dont support them whitout manual checking.

Link de $native
Used automatically in MooTools to implement Array/String/Function/Number methods to browser that dont support them whitout manual checking.

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