1. div设置滚动条
#div_pjContent{
padding-top:10px 10px 10px 10px;
overflow-y:auto;
scrollbar-face-color:#ffffff;
scrollbar-highlight-color:#ffffff;
overflow:auto;
width:265px;
scrollbar-shadow-color:#919192;
scrollbar-3dlight-color:#ffffff;
line-height:18px;
scrollbar-arrow-color:#919192;
scrollbar-track-color:#ffffff;
scrollbar-darkshadow-color:#ffffff;
height:120px;
text-indent:20px;
}
引用http://hi.baidu.com/hbydzss/blog/item/a4e4f503cd41c8753812bb20.html/cmtid/7d67b37e9c014f310cd7da9b
2. 让一个层处于父DIV层的右下角
引用：http://www.ie521.com/blog/article/576.htm
