如何用js控制<span>的class属性，比如onclick=javascript:this.class='css2'

<style>

.css1{background-color:ff0000color:ff9966border:1cursor:hand}

.css2{background-color:00ff00color:ffffffborder:1cursor:hand}

</style>

<span class="css1" onclick="javascript:this.className='css2'">这是一段文字

</span>

$("span").find(".state").each(function()

{

if($(this).html()=="1"

$(this).addClass("current")

})

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