javascript - OnClick, Search on Enter

How do I get the a page to search after hitting "enter" instead of having to click the magnifying glass?

  

    


      
                  alt="Home"
          width="39px"
          height="39px"
          src="http://shesaurus.com/assets/images/home.png"
        />
      
    
    
      class="span5"
      id="appendedInput"
      name="appendedInput"
      type="text"
      placeholder="What's another word for...?       Be sure to click the magnifying glass!"
    />
    
      
    
    


  

I want users to be able to hit "enter" to get results.