复制代码 代码如下:

<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>