//Thay đổi hình ảnh
<!--
if (document.images) {

for(x=1;x<=9;x++){ 

eval("l" + x + "=new Image();");

eval("l" + x + ".src='Images/pic"+x+".jpg';");

eval("s" + x + "=new Image();");

eval("s" + x + ".src='Images/small_"+x+".gif';");

eval("small" + x + "=new Image();");

eval("small" + x + ".src='Images/small"+x+".gif';");

}
  codinh= new Image();
  codinh.src = "Images/pic.jpg"
  }

function changeImages() {

  if (document.images) {

    for (var i=0; i<changeImages.arguments.length; i+=2)

     {

    document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src")

    }

  }

}
// hiding -->