function txtOnFocus (obj,image) {
	if (obj.value == '') {
		obj.style.backgroundImage = 'url(' + image + ')';
		obj.style.backgroundRepeat = 'no-repeat';
		obj.style.backgroundPosition = 'left bottom';
	}
}

function txtOnBlur (obj,img,pos) {
	if (obj.value == '') {
		obj.style.backgroundImage = 'url(' + img + ')';
		obj.style.backgroundRepeat = 'no-repeat';
		obj.style.backgroundPosition = 'left top';
	}
}