How to capture selected standard context menu item

Question

I would like to ask as to how to capture a context menu item? Currently I have a <form> and a hyperlink. What I'm planning to do is when the user right-clicks the link and selects either "Open in new window" or "Open in new tab", the form.submit method will be fired.

Here's a sample "idea" code

HTML

<form id='MyForm' method='post'>
  <div>
    <a id='MyLink' href="#">Click Me</a>
  </div>
</form>

JQuery

$("#MyForm").submit(function(){
  // if a standard context menu item is selected (open in new tab/window)
  if(true) {
    this.target = "_blank";
  }
  else {
    this.target = "MyForm";
  }

  this.action = "MyNewPage.aspx";

  //Do something here
});