*{ padding: 0; margin: 0; border: 0; } body{

height: 2000px;

}
.right_ng{
width: 40px;
height: 100%;
position: absolute;
position: fixed;
right: 0px;
background: #666666;

}
.sign{
width: 40px;
height: 40px;
margin-top:280%;
}
.sign_top{
margin-top: 10px;
}
.sign_add_height{
height: 140px;
background: #888888;
color: #ffffff;
font-size: 13px;
list-style: none;
font-weight: bold;
}
.sign_add_height ul{
margin-top: 6px;
cursor: pointer;
}
.sign_add_height ul li{
list-style-type: none;
width: 20px;
height: 20px;
margin-top: 5px;
}
.buy{
width: 20px;
height: 20px;
border-radius: 10px 10px;
background:#666;
}
.sign_QR{
margin-top: 200%;
position: absolute;
bottom: 50px;
position: fixed;
background: #666666;
}
.sign_end{
position: absolute;
bottom: 0px;
position: fixed;
background: #666666;
}
.sign img{
width: 22px;
height: 22px;
margin-top: 10px;
cursor: pointer;
}
.run_sign{
width: 100px;
height: 40px;
margin-left: -100px;
margin-top: -35px;
background: #666666;
color: #1afa29;
font-size: 13px;
line-height: 40px;
cursor: pointer;
}
.run_QR{
height: 250px;
width: 200px;
margin-left: -200px;
margin-top: -245px;
}
.sign_float{
position: fixed;
}

$(function(){ $('.run_sign').css('display','none'); $(".run_QR img").attr("src","img/17.png"); for(var i=0;i<8;i++){ if(i==6){ $('.sign').eq(i).hover(function(){ $(this).css('background','#ea68a2').find('.img_1').attr("src","img/15.png"); $(this).find('.run_sign').css('visibility','visible').stop().slideDown(200);},function(){ $(this).css('background','#666666').find('.img_1').attr("src","img/7.png"); $(this).find('.run_sign').css('visibility','visible').stop().slideUp(200);})} else if(i==5){ $('.sign').eq(i).hover(function(){ $(this).css('background','#ea68a2').find('img').attr("src","img/14.png");},'#888888').find('img').attr("src","img/6.png");})} else{ $('.sign').eq(i).hover(function(){ var b=$(this).index(); $(this).css('background',"img/"+(b+9)+".png"); $(this).find('.run_sign').css('visibility',function(){ var b=$(this).index(); $(this).css('background','#666666').find('img').attr("src","img/"+(b+1)+".png"); $(this).find('.run_sign').css('visibility','visible').stop().slideUp(200);})}} });

<div class="sign sign_top">