动态生成iframe并更改其CSS

Question

我正在动态生成iframe，并在帮助jquery尝试更改其CSS      var iframeId =“iframe0”;      var iframeIdSelector =“＃”+ iframeId;

  document.getElementById("dialogbox").innerHTML = infoHTML+
  '<iframe id = "'+iframeId+'" seamless src="'+url+'"></iframe>';

  $( '#iframe0' ).contents().find( "body" ).css( "background-color", "blue" );
  // unable to change the css of generated ifame ;