js function confirmHoge() { if( confirm( 'hogehogeしますか？' ) ) { document.form_name.submit(); } else { return false; } } html <form name="form_name" onsubmit="return confirmHoge()" > ... </form> or <form name="form_name" > ... </form> <a href="#" onClick="return confirmHoge()">hogehoge</a>