var authentication = {
	objId : null,
	objPassword : null,
	init : function(idTextInput, passWordInput) {
		this.objId = idTextInput;
		this.objPassword = passWordInput;
		this.objId.onkeydown = function() {
			if (event.keyCode == 13)
				authentication.objPassword.focus();
		};
		this.objPassword.onkeydown = function() {
			if (event.keyCode == 13)
				authentication.login();
		};
	},
	login : function() {
		if (this.check()) {
			this.objId.form.submit();
		}
	},

	check : function() {
		if (this.objId.value == '') {
			alert("Enter User ID.");
			this.objId.focus();
			return false;
		}
		if (this.objPassword.value == '') {
			alert("Enter User Password.");
			this.objPassword.focus();
			return false;
		}
		
		return true;		
	}
};