function DoLogin()
    {
	var form = document.forms['logon'];

	var username = form.elements['username'].value;
	username = username.replace( /[^\x00-\x7F]/g, '' ); // remove non-standard-ASCII characters
	
	var password = form.elements['password'].value;
	password = password.replace( /[^\x00-\x7F]/g, '' ); // remove non-standard-ASCII characters

	if ( g_bLoginInFlight || password.length == 0 || username.length == 0 )
		return;

	g_bLoginInFlight = true;
	$('login_btn_signin').hide();
	$('login_btn_wait').show();
	
	new Ajax.Request( 'https://steamcommunity.com/login/getrsakey/',
		{
			method: 'post',
			parameters: {
				username: username,
				donotcache: ( new Date().getTime() )
			},
			onSuccess: OnRSAKeyResponse,
			onException: function( req, e ) { throw e; }
		}
	);
       }