arcgis for js 修改infowindow样式的方法

function popup(){  $(".esriPopup .titlePane").css({'background-color':'rgba(64,64,64,0.8)'  })  $(".esriPopup .contentPane").css({'background-color':'rgba(64,64,64,0.8)','color':'#FFFFFF'  })  $(".esriPopup .actionsPane").css({'background-color':'rgba(64,64,64,0.8)'  })}

.esriPopup .esriPopupWrapper{background-image: url(../images/beijingtu1.png);background-size:100% 100%;box-shadow: 0 0 0 #777777;  -webkit-box-shadow: 0 0 0 #777777;  padding:3em;}.esriPopup .titlePane{background-color:rgba(64,64,64,0);}.esriPopup .contentPane{background-color:rgba(64,64,64,0);color:#FFFFFF;scrollbar-base-color: #373737;  scrollbar-3dlight-color: #4c4c4c;  scrollbar-highlight-color: #373737;  scrollbar-track-color: #808080;  scrollbar-arrow-color: black;  scrollbar-shadow-color: #373737;  scrollbar-dark-shadow-color: #373737;}.esriPopup .actionsPane{background-color:rgba(64,64,64,0);}