document.forms[0].elements[0].type

Here are all the form elements with their corresponding types:

HTML Element	type Property
INPUT TYPE="button"	"button"
INPUT TYPE="checkbox"	"checkbox"
INPUT TYPE="file"	"file"
INPUT TYPE="hidden"	"hidden"
INPUT TYPE="password"	"password"
INPUT TYPE="radio"	"radio"
INPUT TYPE="reset"	"reset"
INPUT TYPE="submit"	"submit"
INPUT TYPE="text"	"text"
SELECT	"select-one"
SELECT MULTIPLE	"select-multiple"
TEXTAREA	"textarea"

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