<script type="text/javascript"> (function($){ var ele_fix = $("#div_right"); //浮动窗口 var _main = $(".main"); //浮动区域 var ele_offset_top = ele_fix.offset().top; //浮动区域高度 $(window).scroll(function(){ var scro_top = $(this).scrollTop(); //当前高度 var fix_foot_pos = parseInt(ele_fix.height())+parseInt(scro_top)-10; //浮动框最底部到最顶部高度 var mainpos = parseInt(_main.offset().top)+parseInt(_main.height()); if(scro_top <= ele_offset_top&&fix_foot_pos<mainpos){ ele_fix.css({position: "static", top: -10}); }else if(scro_top>ele_offset_top&&fix_foot_pos<mainpos){ ele_fix.css({position: "fixed", top: -10}); }else if(scro_top>ele_offset_top&&fix_foot_pos>mainpos){ var posi = mainpos-fix_foot_pos-10; ele_fix.css({position: "fixed", top: posi}); } }); /* //方案二 $(window).bind("scroll",function() { var temp = '1165'; //判断往下滚 if ($(document).scrollTop() > temp) { //如果大于这个高度，就置顶 flag = false; $('#div_right').css({'position':'fixed', 'top':'-10px', 'margin-top':'0px'}); } if ($(document).scrollTop() <= temp) { //如果小于这个高度，则恢复原来状态 flag = true; $('#div_right').css('position',''); } }); */ })(jQuery); </script>