<form class="search-form" id="sampleForm" action="" method="GET">
    <label for="sampleForm_input" class="sr-only">Search Term</label>
    <input id="sampleForm_input" name="q" type="text"  placeholder="Keywords" />
    <button type="submit" class="btn"><img class="search-img" src="https://static.ndsu.edu/templates/images/search_glass.png" alt="Submit"/></button>
</form>