function imageOff(imageName) {
	if (document.images && doIt=="yes") {
		document[imageName].src = eval(imageName + '_off.src');
	}
}

function imageOn(imageName) {
	if (document.images && doIt=="yes") {
		document[imageName].src = eval(imageName + '_on.src');
	}
}

function changeClass(object, newClass) {
	objRef = document.getElementById(object);
	objRef.className = newClass;
}

function openWindow(url, windowName, width, height) {
	if(screen.width){
		var winl = (screen.width - width) / 2;
		var wint = (screen.height - height) / 2;
	} else{
		winl = 0;
		wint = 0;
	}
	if (winl < 0) winl = 0;
	if (wint < 0) wint = 0;
	
	var settings = '';
	
	settings += 'height=' + height + ',';
	settings += 'width=' + width + ',';
	settings += 'top=200,left=200,';
	settings += 'directories=no,location=no,menubar=no,scrollbars=yes,status=no,toolbar=no,resizable=yes';
	
	var win = window.open(url, windowName, settings);
}

function trim (str) {
	while (str.charAt(0) == ' ') {
		str = str.substring(1);
	}
	
	while (str.charAt(str.length - 1) == ' ') {
		str = str.substring(0, str.length - 1);
	}
	
	return str;
}

function isEmailValid(sEmail) {
	if (sEmail.value == '' || sEmail.indexOf('.') == 0 || sEmail.indexOf('.') == -1 || sEmail.indexOf('@') == 0 || sEmail.indexOf('@') == -1 || sEmail.indexOf('.') == sEmail.length - 1 || sEmail.indexOf('.') == sEmail.length - 2) {
		return false;
	} else {
		return true;
	}
}

function FormatNumber(expr, decplaces) {
	var str = "" + Math.round(eval(expr) * Math.pow(10,decplaces));
	
	while (str.length <= decplaces) {
		str = "0" + str;
	}
	
	var decpoint = str.length - decplaces;
	
	return str.substring(0,decpoint) + "." + str.substring(decpoint, str.length);
}

function hideShowElement(elementId, behavior) {
	if (behavior == 'toggle') {
		//Show or hide element depending on the current state
	    if (document.getElementById(elementId).style.display == '') {
	        document.getElementById(elementId).style.display = 'none';
	    } else {
	        document.getElementById(elementId).style.display = '';
	    }
	} else if (behavior == 'show') {
		//Show element
		document.getElementById(elementId).style.display = '';
	} else if (behavior == 'hide') {
		//Hide element
		document.getElementById(elementId).style.display = 'none';
	}
}

//NOTE:   This function REQUIRES daysInMonth(), which REQUIRES isLeapYear()
function isValidDate(sDate) {
	//Check to make sure two slashes are present in the date provided
	if (sDate.lastIndexOf('/') <= sDate.indexOf('/')) {
		return false;
	}

	//Split on slash
	sDateArray = sDate.split('/');
	
	sMonth = sDateArray[0];
	sDay = sDateArray[1];
	sYear = sDateArray[2];
	
	//Validate year part
	if (isNaN(sYear)) {
		return false;
	}
	
	if (sYear.length == 2) {
		sYear = parseInt('20' + sYear);
	} else {
		if (sYear.length != 4) {
			return false;
		}
	}
	
	if (sDay <= daysInMonth(sMonth, sYear)) {
		return true;
	} else {
		return false;
	}
}

function isLeapYear(yr) {
	if      (yr % 4 != 0)   return false;
	else if (yr % 400 == 0) return true;
	else if (yr % 100 == 0) return false;
	else                    return true;
}

function daysInMonth(mn, yr) {
	var mDay;
	
	if ((mn == 4) || (mn == 6) || (mn == 9) || (mn == 11)) { 
		mDay = 30;
	} else if (mn == 2) {
		//calling leap year function 
		mDay = isLeapYear(yr) ? 29 : 28;    
	} else {
		mDay = 31;
	}
	
	return mDay; 
}

function getRadioValue(objRadio) {
	var itemChecked = false;
	
	for (i=0; i < objRadio.length; i++) {
		if (objRadio[i].checked) {
			itemChecked = true;
			return objRadio[i].value;
		}
	}
	
	if (itemChecked == false) {
		return '';
	}
}

function setRadioValue(objRadio, sValue) {
	for (i=0; i < objRadio.length; i++) {
		if (objRadio[i].value == sValue) {
			objRadio[i].checked = true;
		}
	}
}

function reloadCaptcha(root) {
	var captchaImage = document.getElementById('captcha');
	var captchaInput = document.getElementById('captchaCode');
	
	captchaImage.src = root + 'inc/securimage/show.php?t=' + Math.random();
	captchaInput.value = '';
	captchaInput.focus();
	
	return false;
}