动态创建样式，导入js
加载样式

function addCssByLink(url){     var doc=document;      var link=doc.createElement("link");      link.setAttribute("rel", "stylesheet");      link.setAttribute("type", "text/css");      link.setAttribute("href", url);          var heads = doc.getElementsByTagName("head");      if(heads.length)          heads[0].appendChild(link);      else         doc.documentElement.appendChild(link);  }function addCssByStyle(cssString){      var doc=document;    var style=doc.createElement("style");      style.setAttribute("type", "text/css");      if(style.styleSheet){// IE          style.styleSheet.cssText = cssString;    } else {// w3c          var cssText = doc.createTextNode(cssString);          style.appendChild(cssText);      }      var heads = doc.getElementsByTagName("head");      if(heads.length)          heads[0].appendChild(style);      else         doc.documentElement.appendChild(style);  }  

    //动态添加js    var mapJs = doc.createElement("script");    mapJs.setAttribute("type","text/javascript");    mapJs.setAttribute("src","http://maps.google.com/maps/api/js?sensor=false");    //var heads = doc.getElementsByTagName("head");    doc.documentElement.appendChild(mapJs);