( function () { const contact_forms = document.getElementsByClassName('contact-form'); for ( const form of contact_forms ) { form.onsubmit = function() { const buttons = form.getElementsByTagName('button'); for( const button of buttons ) { button.setAttribute('disabled', true); } } } } )();

Submit

Δdocument.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() );