Javascript: how to access property whose name is dynamic? [duplicate]

This question already has answers here: Closed 11 years ago.

Possible Duplicate:

Javascript create variable from its name

The code below checks to see if the javascript object form_errors has the property whose name is specified by this.name, where this refers to a text input

if (form_errors.hasOwnProperty(this.name)) {
  alert(form_errors.<this.name>;
}

How can I access the property without hard-coding the property name but leaving in the generalized form this.name ? Tha开发者_C百科nks.

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Use brackets:

form_errors[this.name]

You can access any property of an object by passing in a string with its name. For instance, foo.bar and foo['bar'] have the same result.