index <head> <SCRIPT LANGUAGE="JavaScript">   <Begin> function Login(){ var done=0; var username=document.login.username.value; username=username.toLowerCase(); var password=document.login.password.value; password=password.toLowerCase(); if (username=="member1" && password=="password1") { window.location="page1.html"; done=1; } if (username=="member2" && password=="password2") { window.location="page2.html"; done=1; } if (username=="member3" && password=="password3") { window.location="page3.html"; done=1; } if (done==0) { alert("Invalid login!"); } } </End> </SCRIPT>