function SB_onFocus(obj) {
	if (obj.__textEntered == undefined) {
		obj.__placeholderText  = obj.value;
		obj.__placeholderColor = obj.style.color;
	}
	if (!obj.__textEntered) {
		obj.value       = '';
		obj.style.color = 'black';
	}
}

function SB_onBlur(obj) {
	if (obj.value == '') {
		obj.__textEntered = false;
		obj.value       = obj.__placeholderText;
		obj.style.color = obj.__placeholderColor;
	} else {
		obj.__textEntered = true;
	}
}