function signIn() {
	$("#login_error").html("");
	$("#login_username_error").html("");
	$("#login_password_error").html("");
	if (clear_spaces($("#login_username").val()) == "")
		$("#login_username_error").html("Enter Username");
	else if (clear_spaces($("#login_password").val()) == "")
		$("#login_password_error").html("Enter Password");
	else {
		$.ajax({
				type: 'POST',
				url: "php/ajax.php",
				data: "function=login&login_username=" + $("#login_username").val() + "&login_password=" + $("#login_password").val() + "&login_remember=" + (($("#login_remember").is(':checked')) ? 1 : 0),
				success: function(data) {
					if (data && data.success)
					{
						phpsessid = data.phpsessid;
						location.replace(getServerPath());
					}
					else
					{
						switch (data.reason)
						{
							case "wrong":
								$("#login_error").html("Username/Password incorrect. Please try again.");
								break;
							case "empty":
								$("#login_error").html("Please fill in all the details.");
								break;
							case "blocked":
								$("#login_error").html("Your account is blocked.");
								break;
							default:
								$("#login_error").html("Error logging in. Please try again.");
						}

					}
				},error: function() {$("#login_error").html("Username/Password incorrect. Please try again.");},
				dataType: "json"
			   });
	}
}