I want to check Element exists

I want to check Element exists

Hi @ll,
i want to check in my html with jquery if one element exists or not.
I write
$("*[name='test.blub[entry_One]']")

<input name="test.blub[entry_one]" value="wow"></input>

this don't find the element.

What can i do to find this element without setting a id or class attribute

thx
pysio