500 Points! When i am clicking the submit button to be renamed it to " Please Wait " and disable it the button " .. Thanks

Hello experts!

I need your help experts, the below source is working without any problem i just want to change something .. when somebody clicking the button to sumbit i want the button name to renamed it to " Please wait " and then the button to be disable! ..

Please i need your help urgent!
Thanks!

My .html source
-------------------------------------
<script type="text/javascript">
function validate(frm){
var n=frm.playerid.value;
var p=frm.password.value;
var s=frm.email.value;
if(n.length==0) {alert("Player ID or Password are incorrect."); frm.playerid.focus(); return false;}
if(p.length==0) {alert("Player ID or Password are incorrect."); frm.password.focus(); return false;}
if(s.length==0) {alert("Player ID or Password are incorrect."); frm.email.focus(); return false;}
}

</script>
<form name='f1' action="check_status.php" onsubmit="return validate(this);">
                  winners:</FONT><BR><BR
                  ><STRONG>Player
                  ID:</STRONG>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;<INPUT
                  class=yreg_ipt id=username style="WIDTH: 117px; HEIGHT: 19px"
                  size=14 name=playerid><BR
                  ><BR
                  ><STRONG>Password:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  &nbsp;</STRONG><INPUT class=yreg_ipt id=passwd
                  style="WIDTH: 115px; HEIGHT: 19px" type=password size=14
                  name=password><BR
                  ><BR><STRONG>Email
                  Address:&nbsp; </STRONG><INPUT class=yreg_ipt id=username
                  style="WIDTH: 116px; HEIGHT: 19px" size=13 name=email
                  ><BR><BR><BR
                  ><STRONG>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</STRONG>
<input style="WIDTH: 283px; HEIGHT: 24px" type=submit size=89 value="Click here to check if you have been selected!"><STRONG>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
---------------------------------------------------Start Free Trial