... Giới thiệu Java Script Các ví dụVí dụ 1< ;script language="JavaScript"><! function click() {if (event.button==2) {alert('Xin ... nhap nut phai duoc !');}}document.onmousedown=click// >< /script& gt;Ví dụ 2< ;script language="javascript">function bgcolor(obj,state){if (state=="over"){obj.borderColor='#ff0000';obj.style.backgroundColor='#ccccff';}else{obj.borderColor='#ffffff';obj.style.backgroundColor='#ffffff';}}< /script& gt;<! ... (state=="over"){obj.borderColor='#ff0000';obj.style.backgroundColor='#ccccff';}else{obj.borderColor='#ffffff';obj.style.backgroundColor='#ffffff';}}< /script& gt;<! ><table border="1" width="20%" id="table1"...