function NewWindow(sURL, sWindowName, iWidth,iHeight, sScrollYesNo, sResizableYesNo){
	var fLeftPosition, fTopPosition;
	var sSettings;	
	fLeftPosition = (screen.width) ? (screen.width-iWidth)/2 : 0;
	fTopPosition = (screen.height) ? (screen.height-iHeight)/2 : 0;
	sSettings =
	'height='+ iHeight +',width='+ iWidth +',top='+ fTopPosition +',left='+ fLeftPosition +',scrollbars='+ sScrollYesNo +',resizable=' + sResizableYesNo
	window.open(sURL, sWindowName, sSettings)
}
function SwitchNarrowSelection() {
    var divNarrowSection = document.getElementById("divNarrowSection");
    var divNarrowGrade = document.getElementById("divNarrowGrade");
    if (divNarrowSection == null) return;
    divNarrowSection.style.display = 'none';
    divNarrowGrade.style.display='block';
}
function RefreshSections(section) {
    var divSelectorParent = document.getElementById('divSelectorParent');
    var divSelectorTeacher = document.getElementById('divSelectorTeacher');    
    if ( divSelectorParent == null ) return;
    if (section == 1) {
        img_act('sparent');
        turn_on('sparent');
        turn_off('steacher');
    } else if (section == 2) {
        img_act('steacher');
        turn_on('steacher');
        turn_off('sparent');
    }
    var divNarrowSection = document.getElementById("divNarrowSection");
    if (divNarrowSection != null) divNarrowSection.style.display = 'none';
    HomePageItemGet(section, '');
    RefreshDivs(section);
    SaveSection(section);
}
function ShowOverlay(name) {
    var divOverlay = document.getElementById(name);
    if (divOverlay != null) divOverlay.style.display = 'block';
}
function HideOverlay(name) {
    var divOverlay = document.getElementById(name);
    if (divOverlay != null) divOverlay.style.display = 'none';
}
function RefreshGrades(grade) {
    var grades = new Array('stoddler','sprek','sk', 's1', 's2', 's3', 's4', 's5', 's6', 's7', 's8');
    for (i=0; i< grades.length;i++) {
        if (grades[i]!=grade) turn_off(grades[i]);
    }
    turn_on(grade);
    var divNarrowSection = document.getElementById("divNarrowSection");
    if (divNarrowSection != null) divNarrowSection.style.display = 'none';
    var divNarrowGrade = document.getElementById("divNarrowGrade");
    if (divNarrowGrade != null) divNarrowGrade.style.display = 'none';
    OpenSubjects();
    SaveGrade(grade);
}
function OpenSubjects() {
    var divSubjectsOpen = document.getElementById('divSubjectsOpen');
    var divSubjectsClosed = document.getElementById('divSubjectsClosed');
    if (divSubjectsOpen != null) {
        divSubjectsOpen.style.display = 'block';
        divSubjectsClosed.style.display = 'none';
    }   
}
function CloseSubjects() {
    var divSubjectsOpen = document.getElementById('divSubjectsOpen');
    var divSubjectsClosed = document.getElementById('divSubjectsClosed');
    if (divSubjectsOpen == null) return;
    divSubjectsOpen.style.display = 'none';
    divSubjectsClosed.style.display = 'block';
}
function SaveSection(section) {
	xml = getXMLHTTP();
	if(xml){
		xml.open("GET","/SaveSection.aspx?SectionId=" + section);
		xml.send(null);
	}
}
function SaveGrade(grade) {
	xml = getXMLHTTP();
	if(xml){
		xml.open("GET","/SaveGrade.aspx?grade=" + grade);
		xml.send(null);
	}
}
function RefreshDivs(section) {
    var divParent = document.getElementById('divParent');
    var divTeacher = document.getElementById('divTeacher');
    var divDefault = document.getElementById('divDefault');
    if ( divParent == null ) return;
    if (section == 1) {
        divParent.style.display = 'block';
        divTeacher.style.display = 'none';
        divDefault.style.display = 'none';
    } else if (section == 2) {
        divParent.style.display = 'none';
        divTeacher.style.display = 'block';
        divDefault.style.display = 'none';
    } else {
        divParent.style.display = 'none';
        divTeacher.style.display = 'none';
        divDefault.style.display = 'block';
    }
}
function NewWindow(sURL, sWindowName, iWidth,iHeight, sScrollYesNo, sResizableYesNo) {
	var fLeftPosition, fTopPosition;
	var sSettings;	
	fLeftPosition = (screen.width) ? (screen.width-iWidth)/2 : 0;
	fTopPosition = (screen.height) ? (screen.height-iHeight)/2 : 0;
	sSettings =
	'height='+ iHeight +',width='+ iWidth +',top='+ fTopPosition +',left='+ fLeftPosition +',scrollbars='+ sScrollYesNo +',resizable=' + sResizableYesNo
	window.open(sURL, sWindowName, sSettings)
}
function isCurrency(Field) {
	strValue = Field.value;
	regexp = /^(([0-9]{1,3}(\,[0-9]{3})*)|([0-9]{0,3}))(\.[0-9]{2})?$/
	if (isEmpty(strValue)) {
		return false;
	}
	return regexp.test(strValue);
}
function isFloat(Field) {
	strValue = Field.value;
	regexp = /^(\+|\-)?([0-9]+)(((\.|\,)?([0-9]+))?)$/
	if (isEmpty(strValue)) {
		return false;
	}
	return regexp.test(strValue);
}
function isInteger(Field) {
	strValue = getValue(Field);
	regexp = /^(\+|\-)?([0-9]+)$/
	if (isEmpty(strValue)) {
		return false;
	}
	return regexp.test(strValue);
}
function isUserName(Field) {
	strValue = getValue(Field);
	regexp = /^([^$@\\ ]+)$/
	if (isEmpty(strValue)) {
		return false;
	}
	return regexp.test(strValue);
}
function isCreditCardNumber(Field) {
	var iChkSum=0;
	var ccnum = getValue(Field);
	ccnum = ccnum.replace( /\D/g, "" );
	// check for correct card number length
	if (ccnum.length<13) return false;
    // make an array and fill it with the individual digits of the cc number
    ccnumchk=new Array;
	for (iLoop=0; iLoop < ccnum.length; iLoop++) {
		ccnumchk[ccnum.length-1-iLoop] = ccnum.substring(iLoop, iLoop+1);
	}
    // perform the weird mathematical method (some base 10 stuff) to
    // convert the number to a two digit number
    // for those of you who aren't as familiar with the js operators
    // i'll comment some of the math lines...well, really just one
    var skemp=0;
	for (iLoop=0; iLoop < ccnum.length; iLoop++) {
		// if splits is an even number...
        if (iLoop %2 != 0) {
			ccnumchk[iLoop]=ccnumchk[iLoop]*2;
			if (ccnumchk[iLoop] >= 10) ccnumchk[iLoop]=ccnumchk[iLoop]-9;
		}
        // switch ccnumchk[splits] to a number
		ccnumchk[iLoop]++;
		ccnumchk[iLoop]--;
		iChkSum = iChkSum + ccnumchk[iLoop].valueOf();
	}
	if (iChkSum%10 != 0) { return false; } // The result isn't base 10
	return true;
}
function isEmail(Field) {
	strValue = getValue(Field);
	regexp = /^[A-Za-z0-9]+[A-Za-z0-9\_\-\.]*\@([A-Za-z0-9\-]+\.)+[A-Za-z]{2,5}$/
	if (isEmpty(strValue)) {
		return false;
	}
	return regexp.test(strValue);
}
function isEmptyWysiwyg(Field) {
	strValue = getValue(Field);
	// delete all default tags
	rexp = /&nbsp;/gi;
	strValue = strValue.replace(rexp, '');
	rexp = /<p><\/p>/gi;
	strValue = strValue.replace(rexp, '');
	rexp = /<p>&nbsp;<\/p>/gi;
	strValue = strValue.replace(rexp, '');
	if (isEmpty(strValue)) {
		return true;
	}
	return false;
}
function isURL(Field) {
	strValue = getValue(Field);
	regexp = /^http(s?):\/\/([^$@\\ ]+)$/i
	if (isEmpty(strValue)) {
		return false;
	}
	return regexp.test(strValue);
}
function isEmailList(Field) {
	strValue = getValue(Field);
	// delete all spaces near comma
	rexp = /, /gi;
	strValue = strValue.replace(rexp, ',');
	rexp = / ,/gi;
	strValue = strValue.replace(rexp, ',');
	strArray = strValue.split(",");
	regexp = /^[A-Za-z0-9]+[A-Za-z0-9\_\-\.]*\@([A-Za-z0-9\-]+\.)+[A-Za-z]{2,5}$/
	for (var i=0; i < strArray.length; i++) {
		if (isEmpty(strArray[i])) return false;
		if (!regexp.test(strArray[i])) return false;
	}
	// set new field value (with removed spaces between comma and addresses)
	Field.value = strValue;
	return true;
}
function isZip(Field) {
	strValue = getValue(Field);
	if (isEmpty(strValue)) {
		return false;
	}
	if (strValue.indexOf('-') >=0 ) {
		regexp = /^\d{5}-\d{4}$/
	} else {
		regexp = /^\d{5}$/
	}
	return regexp.test(strValue);
}
function isPhone(Field) {
	strValue = getValue(Field);
	regexp = /^1{0,1} *(-| ){0,1} *[\(]*[0-9]{0,3}[\)]* *(-| ){0,1} *[0-9]{3} *(-| ){0,1} *[0-9]{4}$/;
	if (isEmpty(strValue)) {
		return false;
	}
	return regexp.test(strValue);
}
function isFax(Field) {
	strValue = getValue(Field);
	regexp = /^\d{3}-\d{3}-\d{4}$/
	if (isEmpty(strValue)) {
		return false;
	}
	return regexp.test(strValue);
}
function isEmpty(s) {
	if (s == null || trim(s) == '') {
		return true;
	}
	else {
		return false;
	}
}
function isText(f) {
	return !isEmptyField(f);
}
function isNotEmptyDate(val) {
    return !isEmptyDate(val);
}
function isNotEmptyTime(val) {
    return !isEmptyTime(val);
}
function isEmptyDate(val) {
	var ctrl = document.getElementById(val.controltovalidate + '_cal');
	return isEmptyField(ctrl);
}
function isEmptyTime(val) {
	var ctrl_h = document.getElementById(val.controltovalidate + '_H');
	var ctrl_m = document.getElementById(val.controltovalidate + '_M');
	var ctrl_ampm = document.getElementById(val.controltovalidate + '_AMPM');
    if (ctrl_h.selectedIndex == 0) return true;
    if (ctrl_m.selectedIndex == 0) return true;
    if (ctrl_ampm.selectedIndex == 0) return true;
	return false;
}
function isValidDate(val) {
	var ctrl = document.getElementById(val.controltovalidate + '_cal');
	return isDate(ctrl);
}
function isValidTime(val) {    
	var ctrl_h = document.getElementById(val.controltovalidate + '_H');
	var ctrl_m = document.getElementById(val.controltovalidate + '_M');
	var ctrl_ampm = document.getElementById(val.controltovalidate + '_AMPM');
    if (ctrl_h.selectedIndex == 0 && ctrl_m.selectedIndex == 0 && ctrl_ampm.selectedIndex == 0) return true;
    if (ctrl_h.selectedIndex == 0) return false;
    if (ctrl_m.selectedIndex == 0) return false;
    if (ctrl_ampm.selectedIndex == 0) return false;
	return true;
}
function isDate(Field) {
	if (isEmptyField(Field)) return true;
    var dtArray = Field.value.split('/');
    if (dtArray.length != 3) return false;
	return CheckDate(dtArray[0],dtArray[1],dtArray[2]);
}
function CheckDate(m,d,y) {
	Months = "31/!/28/!/31/!/30/!/31/!/30/!/31/!/31/!/30/!/31/!/30/!/31";
	MonthArray  = Months.split("/!/");
	if (isNaN(parseInt(m,10))) return false;
	if (isNaN(parseInt(d,10))) return false;
	if (isNaN(parseInt(y,10))) return false;
    if (d != parseInt(d,10)) return false;
    if (m != parseInt(m,10)) return false;
    if (y != parseInt(y,10)) return false;
	d = parseInt(d,10);
	m = parseInt(m,10);
	y = parseInt(y,10);
	y = convertYear(y);
	if (y <= 1900 ) return false;
	if (y >= 2100 ) return false;
	if (m < 1 || m > 12 ) return false;
	if ( isLeapYear(y)) MonthArray[1] = eval(eval(MonthArray[1]) + 1);
	if (d<1 || MonthArray[m-1] < d ) return false;
	return true;
}
function convertYear(y) {
	var borderYEAR = 40;
	yearvalue = parseInt(y,10);
	if (isNaN(yearvalue)) return y;
	if (yearvalue - borderYEAR <= 0) {
		yearvalue = yearvalue + 2000
	} else if (yearvalue - 100 < 0) {
		yearvalue = yearvalue + 1900
	}
	return yearvalue;
}
function isLeapYear(Year)
{
	if(Math.round(Year/4) == Year/4){
		if(Math.round(Year/100) == Year/100){
			if(Math.round(Year/400) == Year/400)
				return true;
			else return false;
		}else return true;
	}
	return false;
}
function getValue(Field) {
	fieldType = Field.type;
	if (fieldType == "text") {
		return getTextValue(Field);
	} else if (fieldType == "hidden") {
		return getTextValue(Field);
	} else if (fieldType == "select-one") {
		return getListValue(Field);
	} else if (fieldType == "textarea") {
		return getTextValue(Field);
	} else if (fieldType == "file") {
		return getTextValue(Field);
	} else if (fieldType == "password") {
		return getTextValue(Field);
	} else if (fieldType == "checkbox") {
		return getCheckboxValue(Field);
	} else if (isNaN(fieldType)) {
		return getRadioValue(Field);
	} else {
		return getTextValue(Field);
	}
}
function getListValue(Field) {
	return Field[Field.selectedIndex].value;
}
function getTextValue(Field) {
	return Field.value;
}
function getCheckboxValue(Field) {
	if (Field.checked) return Field.value;
	return '';
}
function getRadioValue(Field) {
	found = false;
	if(isNaN(Field.length)) {
		return Field.value;
	}
	for(var i=0; i< Field.length; i++) {
		if ( Field[i].checked ) {
			return Field[i].value;
			break;
		}
	}
	return !found;
}
function trim(str) {
	while (str.substring(0,1) == " ") {
		str = str.substring(1,str.length);
	}
	while (str.substring(str.length-1,str.length) == " ") {
		str = str.substring(0,str.length-1);
	}
	return str;
}
function isEmptyList(Field) {
	return isEmpty(Field[Field.selectedIndex].value);
}
function isEmptyText(Field) {
	return isEmpty(Field.value)
}
function isEmptyCheckbox(Field) {
	return !Field.checked;
}
function isEmptyField(Field) {
	fieldType = Field.type;
	if (fieldType == "text") {
		return isEmptyText(Field);
	} else if (fieldType == "hidden") {
		return isEmptyText(Field);
	} else if (fieldType == "file") {
		return isEmptyText(Field);
	} else if (fieldType == "select-one") {
		return isEmptyList(Field);
	} else if (fieldType == "textarea") {
		return isEmptyText(Field);
	} else if (fieldType == "password") {
		return isEmptyText(Field);
	} else if (fieldType == "checkbox") {
		return isEmptyCheckbox(Field)
	} else if (isNaN(fieldType)) {
		return isEmptyRadio(Field)
	} else {
		return isEmptyText(Field);
	}
}
function isDefined(obj) {
	if(typeof(obj) == "undefined") {
          return false;
	} else {
          return true;
	}
}
function isEmptyRadio(Field) {
	found = false;
	if(isNaN(Field.length)) {
		return !Field.checked;
	}	
	for(var i=0; i< Field.length; i++) {
		if ( Field[i].checked ) {
			found = true;
			break;
		}
	}	
	return !found;
}
function isNotEmptyFile(val) {
    return !isEmptyFile(val);
}
function isEmptyFile(val) {
    var oid, fid, cid, bDelChecked = false;
    oid = document.getElementById(val.controltovalidate + '_OLD');
    fid = document.getElementById(val.controltovalidate + '_FILE');
    cid = document.getElementById(val.controltovalidate + '_CHK');
    if (cid != null) { bDelChecked = cid.checked; }
    return (isEmptyField(oid) && isEmptyField(fid) || isEmptyField(fid) && bDelChecked);
}
function isValidFile(val) {
    if (isEmptyFile(val)) return true;
    var fid = document.getElementById(val.controltovalidate + '_FILE');
    if (isEmptyField(fid)) return true;
    var filename = getValue(fid);
    var lastDot = filename.lastIndexOf(".")
    if (lastDot == -1) return false;
    var ext = filename.substring(lastDot+1,filename.length);
    filename = filename.substring(0,lastDot);
    if (filename == '') return false;
    var aExtensions = val.extensions.split(",");
    for (i=0; i < aExtensions.length; i++) {
        if (aExtensions[i] == ext.toLowerCase()) return true;
    }
    return false;
}
function limit(fname, width, maxChar) {
	ctrl = document.getElementById(fname + '_ctrl');
	x = maxChar - ctrl.value.length;
	if (x < 0) {
		ctrl.value = ctrl.value.substring(0, maxChar); x = 0; 
	}
	var ta1, ta2, d; 
	ta1 = document.getElementById(fname + 'TA1');
	ta1.style.width = Math.floor(width*(maxChar-x)/maxChar) + 'px';
	ta1.alt = maxChar-x+" chars used";
	ta2 = document.getElementById(fname + 'TA2');
	ta2.style.width = Math.floor(width*x/maxChar) + 'px';
	ta2.alt = x + " chars available";
	d = document.getElementById(fname + 'DIV');
	d.innerHTML = x + " characters left ";
	window.status = ta1.width + " : " + ta2.width;
}
var ctrl_to_disable;
function PleaseWait(ctrl) {
    ctrl_to_disable = ctrl
    window.setTimeout("PleaseWaitTimeout()", 10);
}
function PleaseWaitTimeout(ctrlid) {
    ctrl_to_disable.value= 'Please wait...'; 
    ctrl_to_disable.disabled = true;
}