/* #div1 {
    overflow:scroll;
    height:300px;
    width:1200;
}
#div1 table {
   width: 1200px;
   background-color:rgb(255, 255, 255);
}  */

.header_fijo {
    height:300px;
    width:relative;
    table-layout: fixed;
    border-collapse: collapse;
  }
 
  .header_fijo thead tr {
    position: relative;
  }
  
  .header_fijo tbody {
    display: block;
    overflow: auto;
    width:500%;
    height: 380px;
  }

  .header_fijo tbody tr {
    width:500%;
    position: relative;
  }


  .header_fijo tbody td {
   
    position: relative;
  }