// Common form checking functions
		
function isEmptyField(srcField) {
	srcText = srcField.value;
	srcText = srcText.replace(/^\s+/g, '').replace(/\s+$/g, '');
	if(srcText == "") {
		srcField.value = "";
		return true;
	} else return false;
}

function isValidEmail(src) {
	var emailReg = "^\\w+[\\+\\.\\w-]*@([\\w-]+\\.)*\\w+[\\w-]*\\.([A-Za-z]{2,4}|\\d+)$";
	var regex = new RegExp(emailReg);
	return regex.test(src);
}

function checkImageSize(srcImage,maxWidth,maxHeight) {
	if(document.images) {
		getWidth = srcImage.width;
		getHeight = srcImage.height;
		if(getWidth>maxWidth || getHeight>maxHeight) {
			widthVariance = maxWidth/getWidth;
			heightVariance = maxHeight/getHeight;
			if(widthVariance<=heightVariance) scalePercentage = getWidth/maxWidth;
			else scalePercentage = getHeight/maxHeight;
			srcImage.width = getWidth/scalePercentage;
			srcImage.height = getHeight/scalePercentage;
		}
	}
}