function clearField(objFld, strDefault) {
	if (objFld.value == strDefault) {
		objFld.value = '';
	}
	addCssClass(objFld, 'inputActive');
}

function resetField(objFld, strDefault) {
	if (objFld.value == '') {
		objFld.value = strDefault;
	}
	removeCssClass(objFld, 'inputActive');
}

function addCssClass(objFld, cssClassName) {
	var reg = new RegExp('(\\s|^)' + cssClassName + '(\\s|$)')
	if ( ! objFld.className.match(reg) ) { 
		objFld.className += ' ' + cssClassName + ' '; 
	}
}

function removeCssClass(objFld, cssClassName) {
	var reg = new RegExp('(\\s|^)' + cssClassName + '(\\s|$)');
	objFld.className = objFld.className.replace(reg, ' '); 
}