JavaScriptda atributlarni o'rnatish

Задание 1

Berilgan element:

html<input id="elem">

Uning value atributini 'text' qiymatiga o'rnating.

Задание 2

Berilgan element:

html<input id="elem">

Uning class atributini 'valid' qiymatiga o'rnating.