function login(option) 
{
	var username = $("#username").val();
	var password = $("#password").val();
	if (option == 0)
	{
		check_login("login.asp", window.location, username, password);
	}
	else
	{
		check_login("backend/login.asp", username, password);
	}
}

function checkEnter(e,option) { //e is event object passed from function invocation
	var characterCode // literal character code will be stored in this variable
	if(e && e.which) { //if which property of event object is supported (NN4)
		e = e
		characterCode = e.which //character code is contained in NN4's which property
	} else {
		//e = event
		characterCode = e.keyCode //character code is contained in IE's keyCode property
	}
	
	if(characterCode == 13) { //if generated character code is equal to ascii 13 (if enter key)
		login(option);
		return false
	} else {
		return true
	}

}

function check_login(strURL, strURLRetorn, user, pass) {
	$("#loginresult").hide();
	$.post(strURL, { username: user, password: pass },
		function(html){
			if (html.substring(0,2)=="ok") {
					document.location = strURLRetorn;
			}else {
				$("#loginresult").html($.trim(html));
				$("#loginresult").show();
			}
		});
}