function dynamicLoad(jsFileName){

  //--for cache 
  var now = new Date();
  var getData = '/js/live/' +jsFileName+'?nc='+now.getTime();

  if( document.all ){ 

     if( navigator.userAgent.indexOf("Win")!=-1 ){

       //--for document.all && Win
       eval(document.all('dynld')).src = getData;

     } else if( navigator.userAgent.indexOf("Mac")!=-1 ){

       //--for document.all && Mac
       document.body.insertAdjacentHTML('BeforeEnd'
        ,'<scr'+'ipt src="'+getData+'"><scr'+'ipt/>');

     }

  } else if(document.getElementById){

    //--for w3c-dom  widthout document.all 
    var cnode =document.getElementById('dynld');
    var nnode = document.createElement('script');
    nnode.src = getData;
    nnode.id  = 'dynld';
    cnode.parentNode.replaceChild(nnode,cnode);

  } else {

    //--for nondhtml(n4...)
    if(document.images){
      var datasrc   = new Image();
      datasrc.src   = getData;
      location.href = datasrc.src;
    }

  }
}
document.write('<scr'+'ipt id="dynld"></scr'+'ipt>');