jquery如何实现锚点链接之间的平滑滚动

$("a[href*=#]").click(function(){
if(location.pathname.replace(/^\//,"")==this.pathname.replace(/^\//,"")&&location.hostname==this.hostname){
var$target=$(this.hash);
$target=$target.length&&$target||$("[name="+this.hash.slice(1)+"]");
if($target.length){
vartargetOffset=$target.offset().top;
$("html,body").animate({
scrollTop:targetOffset
},
500);
returnfalse;
}
}
});