function log(s)
{
	if(s.value== '') s.value='0';
}

function relog(s)
{
	if(s.value== '0') s.value='';
}

function enlight_focus(s)
{
	s.style.background=''; s.style.color='';

}

function enlight_blur(s)
{
	s.style.background=''; s.style.color='';
}