snippet.js

each = function( list, callback ) { 
    for ( index = 0; index < list.length; index++) { 
        callback( list[index] )
    }
}; 

each( document.querySelectorAll( 'input[type=checkbox]' ), function( element ) { 
    element.click() 
} );

document.querySelector('#toolbar input[name=commit]').click();