Jquery网页内滑动缓冲导航的实现代码

<script src="http://apps.bdimg.com/libs/jquery/1.7.2/jquery.min.js"></script> <script type="text/javascript">jQuery.fn.anchorGoWhere = function(options){  var obj = jQuery(this);  var defaults = {target:0, timer:500};  var o = jQuery.extend(defaults,options);  obj.each(function(i){   jQuery(obj[i]).click(function(){    var _rel = jQuery(this).attr("href").substr(1);    switch(o.target){     case 1:      var _targetTop = jQuery("#"+_rel).offset().top;      jQuery("html,body").animate({scrollTop:_targetTop},o.timer);      break;     case 2:      var _targetLeft = jQuery("#"+_rel).offset().left;      jQuery("html,body").animate({scrollLeft:_targetLeft},o.timer);      break;    }   return false;   });  }); }; $("#mybtn").anchorGoWhere({target:1}); //这里是点击按钮的ID</script>