function show_forget () {
 document.getElementById('divlogin').style.display='none';
 document.getElementById('divforget').style.display='block';
}

function show_login () {
 document.getElementById('divforget').style.display='none';
 document.getElementById('divlogin').style.display='block';
}

function reload_captcha(elem){
 var nd = new Date();
 var src="captcha/captcha.php?"+nd;
 document.getElementById("captcha").src= src;
}