Simple "Captcha" for Shopify

Simple "Captcha" for Shopify

// Goes in theme.liquid
{% if template contains 'contact' %}
	{{ 'https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js' | script_tag }}
	<script type="text/javascript">
	     $(document).ready(function() {
	   	   var n1 = Math.round(Math.random() * 10 + 1);
	     	   var n2 = Math.round(Math.random() * 10 + 1);
	   	   $("#question").val(n1 + " + " + n2);
	  	   $(".contact-form").submit(function (e) {
	          	   if (eval($("#question").val()) != $("#answer").val()) {
	                     $("#answer").css('box-shadow', '0px 0px 7px red');
	              	     e.preventDefault(); 
	          	   } 
	     	   });
	    });
	 </script>
{% endif %}

// page.contact.liquid
<div class="rte">
	{{page.content}}
	{% form 'contact' %}
		{% if form.posted_successfully? %}
	  		Thanks for contacting us! We&rsquo;ll get back to you soon.
		{% endif %}
		{% if form.errors %}
	  		{% for field in form.errors %}
	    		{{ field }} - {{ form.errors.messages[field] }}<br />
	  		{% endfor %}
		{% endif %}
		<input type="text" name="contact[name]" placeholder="name" />
	    <input type="text" name="contact[email]" placeholder="email address" class="{% if form.errors contains 'email' %}input-error{% endif %}" />
	    <textarea name="contact[body]" rows="20" cols="20" placeholder="message" class="{% if form.errors contains 'body' %}input-error{% endif %}"></textarea>
		<div class="captcha">
	        How much is: <input type="text" readonly="readonly" id="question"/>
	        Answer:* <input type="text" id="answer"/>
		</div>
	    <button type="submit">Send</button>
	{% endform %}
</div> <!-- end .rte -->