<style type="text/css">
.css_test input {
border-radius : 5px;
border : 3px solid gray;
margin-top : 10px;
padding : 7px;
width : 300px;
}
.css_test img {
margin-top : 10px;
width : 150px;
cursor : pointer;
}
</style>
<b>:first</b> 셀렉터와 비교해 볼까요? 결과는 같습니다.<br><br>
<button type="button"
onclick="j_test( $('.css_test img')
.first() )">$( '셀렉터' )
.first()</button>
<button type="button"
onclick="j_test( $('.css_test img:first') )">$( '셀렉터 :first' )</button>
<div class="css_test">
<img src="//superkts.com/img/huk1.gif" />
<img src="//superkts.com/img/huk1.gif" />
<img src="//superkts.com/img/huk1.gif" />
</div>
<script type="text/javascript">
function j_test(o){
$(o).attr( 'src', '//superkts.com/img/huk2.gif' );
setTimeout(function(){
$(o).attr( 'src', '//superkts.com/img/huk1.gif' );
}, 1000);
}
</script>