js on submit code example

Example 1: js form submit listener

document.getElementById("#myFormId").addEventListener("submit", function(e){
    if(!isValid){
        e.preventDefault();    //stop form from submitting
    }
  	//do whatever an submit the form
});

Example 2: javascript submit form

document.getElementById("myForm").submit();

Example 3: javascript submit form

document.forms["myform"].submit();