var badSIDchars = new String(" \"/\\[]:|=,+*?<>()"); // same as "nogood" array in CGI code.
var badFieldchars = new String("\"\\");
var alphabet = new String("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"); // same as decrypt.c but no '*'
var isOnline = true;

function doLogin() 
{
	document.forms["form1"].locale.value = '';
	doTallerLogin(0,0);
}


function doLoginAccessible()
{
	document.forms["form1"].locale.value = 'en_ACCESSIBLE';
	doTallerLogin(0,1);
}

function doTallerLogin( extra,scrollable ) {

	if (!checkCookies())
	{

		lmsPopup.open("/dpec/NoCookies.htm");
		return;
	}
	
	if (checkFields())
	{
		if (isOnline)
		{
			if (extra > 0)
				lmsPopup.extraHeight = extra;
			var lms_win = lmsPopup.open("", scrollable);
			// if the LMS window is already open,
			// prevent the unload handler from logging out.
			try
			{
				if (lms_win != null && typeof(lms_win.doLogout) != "undefined")
					lms_win.doLogout = false;
			}
			catch(e) {}
			setTimeout( "clearPasswordField()", 3000 );
		}
		document.forms["form1"].action = fixExtension( document.forms["form1"].action );
		document.forms["form1"].submit();
	}
}

function checkCookies()
{
	thisPage.setCookie("test","123");
	if (thisPage.getCookie("test") != "123")
		return false;
	thisPage.setCookie("test","",-1000);

	thisPage.setCookie("test","123",1000);
	if (thisPage.getCookie("test") != "123")
		return false;
	thisPage.setCookie("test","",-1000);

	return true;
}

// allow for ASP/JSP flexibility
function fixExtension( url )
{
	var result = new String(url);
	var pos = result.lastIndexOf(".");
	if (pos != -1)
	{
		result = result.substr(0, pos + 1);
    result += "jsp";
	}
	return result;
}

function clearPasswordField() {
	// Netscape 4.x needs this to be separated from the submit()
	document.forms["form1"].password.value = "";
}

function checkFields() { 

	if(EmptyField("ID", document.forms["form1"].elements["userid"].value) || !ValidField("ID", document.forms["form1"].elements["userid"].value, 255, badSIDchars)) {
		document.forms["form1"].elements["userid"].focus();
		document.forms["form1"].elements["userid"].select();
		return false;
	}

	if(document.forms["form1"].elements["userid"].value != "") {
		if(!ValidPassword(document.forms["form1"].elements["password"].value)) {
			document.forms["form1"].elements["password"].focus();
			document.forms["form1"].elements["password"].select();
			return false;
		}
	}
	return true;
}

// COMMON HTML PAGE FUNCTIONS >>>>>>>>>>>>>>>>>> 

function ValidField(fieldName, fieldValue, maxLength, badChars) {
	if(ValidLength(fieldName, fieldValue.length, maxLength))
		if(ValidChars(fieldName, fieldValue, badChars))
			return true;
	return false;
}

function ValidLength(fieldName, fieldLength, maxLength) {
	if(fieldLength <= maxLength)
		return true;
	else {
		alert(fieldName.toUpperCase() + " exceeds " + maxLength + " characters");
		return false;
	}
}

function ValidChars(fieldName, fieldValue, badChars) {
	for (var i=0; i<badChars.length; i++) {
		if (-1 != (fieldValue.indexOf(badChars.charAt(i)))) {
			alert("Bad character in " + fieldName.toUpperCase() + "\nThe following characters are not valid:\n" + FormatBadChars(badChars));
			return false;
		}
	}
	return true;
}

function FormatBadChars(badChars) {
	var fmtStr = new String();
	for (var i=0,j=0; i<badChars.length; i++) {
			fmtStr+= badChars.charAt(i);
			fmtStr+= " "; 
	}
	return fmtStr;
}

function EmptyField(fieldName, fieldValue) {
	if(fieldValue == "") {
		alert("Please enter " + fieldName.toUpperCase());
		return true;
	}
	else
		return false;
}

function ValidPassword(passWord) {

	if(ValidLength("Password", passWord.length, 255)) {
		return true;
	}
	return false
}