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$(".circle_b").hover(function(){
$(this).stop().animate({width:188,height:188,marginTop:"-20",marginLeft:"-20"},500)
.css({"border-radius":"150px"});
$(".circle_l").stop().animate({marginTop:"20"},500)
},function(){
$(this).stop().animate({width:148,height:148,marginTop:"0",marginLeft:"0"},500)
.css({"border-radius":"100px"});
$(".circle_l").stop().animate({marginTop:"0"},500)
})
</script>