grid 单击一行，怎么改变颜色
http://www.iteye.com/problems/13975
设置为 sm:new RowSelectionModel({})
然后修改样式:
.x-grid3-row-selected {
-moz-background-clip:border !important;
-moz-background-inline-policy:continuous !important;
-moz-background-origin:padding !important;
background:#DFE8F6 none repeat scroll 0 0 !important;
border:1px dotted #A3BAE9;
}
其中的background:#DFE8F6就是背景颜色
获取单击行后修改背景色