How Can I check if any string of an Array is matched?

Hello,

I am looking for a way to check if any sting of the Array is matched to the string that in the TextField. In the code it should be something like that:

Code:

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var TestString:Array = new Array ("chicken", "cat", "dog");

function LookStringArray(){                       
      if  (TestArrayTextfield_txt.text  ==  (anyString.TestString)){
                StringExist = true;
                trace (StringExist);       
      } 
}

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Please let me know what will be the best approach. Thank you in advance.

Code:

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var index:int = TestString.indexOf(TestArrayTextfield_txt.text);

if(index>=0){
    trace('match at '+index);
} else {
    trace('no match');
}

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Thank you. I will try that.