Ext点击表格行变色

grid.on("rowclick", function(grid,rowIndex,event) {//适用情况:单选的非树表表格if ((grid.ShowCheckBox !="显示") && (grid.getXType()=='editorgrid')) {var xdynode = event.target;          while(xdynode.tagName != 'TR'){               xdynode = xdynode.parentNode;               if(xdynode == null || xdynode.tagName == 'TR'){                   break;               }           }           if (xdynode != null && xdynode != undefined){          var elDiv = xdynode.parentNode.parentNode.parentNode.parentNode;        for(var i = 0; i<elDiv.childNodes.length;i++){           elDiv.childNodes[i].childNodes[0].childNodes[0].childNodes[0].style.cssText="background-color:";       }       xdynode.style.cssText="background-color:#b8cfee";         } }});