jQuery .valid() throws error

In my JavaScript function sometimes $(args._postBackElement).valid() throws error because it is not a valid input element. Is there any way to check whether .valid() can be called for开发者_StackOverflow社区 that element?

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You could do -

$(args._postBackElement).length 

to see if the element existed, or -

$(args._postBackElement).is(":input")

to see if it's an input element.