JS forms

<form name='myform' id="formID">
  Name <input type="text" name='nameInput' value='enter your name' class="foo"> 
  Email <input type="text" name="emailInput" value="enter your email">
  <input type="submit" name="submitBtn" value="Submit">
  <p></p>
</form>


--- get form element on page: by ID attribute, by value of form's attribute 'name'
  document.getElementById("formID")
  document.myform

--- get all elements in form
  document.getElementById("formID").elements
  document.myform.elements
  
for(var i=0; i< form.elements.length; i++){
  var el = form.elements[i];
    // get all attributes of inputs-elements
      el.type (text, button, submit, reset, radio, select, checkbox)
      el.value (value of 'value' attribute)
      el.name (value of 'name' attribute)
      el.form.name (gets value of name's form attribute, where is element contains)
}

--- get particular form's element by its value of 'name' attribute
  document.getElementById("formID").submitBtn 
  document.myform.submitBtn