请问如何清除这个定时器:div {width:100px;height:100px;background-color:green;}input {margin-top:10px;}<div></div><input type = "button" value = "点我开始"><input type = "button" value = "拜拜">$("input:eq(0)").click(function(){var a = setInterval(round,1000);})function round(){$("div").animate( { width:"300px",
height:"300px"
},2000)$("div").animate( { width:"100px",
height:"100px"
},2000)}
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