html parameter role code example

Example 1: parameters in javascript

function myFunction(x, y) {
  if (y === undefined) {
    y = 2;
  }
}

Example 2: javascript function with input value

<button class="btn btn-primary" onclick="transmit({search: document.getElementById('search_id').value});">
	<span class="glyphicon glyphicon-search"></span>
</button>