CodePlayer

jQuery( ":image" )

<div id="n1">
	<form id="n2">
	   <input id="n3" type="button" value="Input Button"/>
	   <input id="n4" type="checkbox" />
	   <input id="n5" type="file" />
	   <input id="n6" type="hidden" />
	   <input id="n7" type="image" />
	   <input id="n8" type="password" />
	   <input id="n9" type="radio" />
	   <input id="n10" type="reset" />
	
	   <input id="n11" type="submit" />
	   <input id="n12" type="text" />
	   <select id="n13">
	   	<option id="n14">Option</option>
	   </select>
	   <textarea id="n15"></textarea>
	   <button id="n16" type="submit">Button</button>
	</form>
</div>

// 选择了id为n7的一个元素
$(":image");