function update_input_color(object, event)
{ // general enough to work on both edit stock and add stock form inputs
	if (event == 'onblur')
	{
		if (object.value == '')
		{
			if (object.id.indexOf('username') >= 0)
			{
				object.value = 'email';
			}
			else if (object.id.indexOf('password') >= 0)
			{
				object.value = 'pass';
			}
			else if (object.id.indexOf('model_name') >= 0)
			{
				object.value = 'model name';
			}
		}
	}
	else if (event == 'onfocus')
	{
		if (object.id.indexOf('username') >= 0 && object.value == 'email')
		{
			object.value = '';
		}
		else if (object.id.indexOf('password') >= 0 && object.value == 'pass')
		{
			object.value = '';
		}
		else if (object.id.indexOf('model_name') >= 0 && object.value == 'model name')
		{
			object.value = '';
		}
	}
}