function doClearHint(inputObj)	{
	var classArray = inputObj.className.split(' ');
    for (var i in classArray)	{
    	if (classArray[i] == 'FormatHint')	{
    		classArray.splice (i, 1);
    		break;
    	}
    }
    inputObj.value = '';
    inputObj.className = classArray.join(' ');
}