function s(string) {
	var i = 0, b = true;
	var str = document.getElementsByTagName('font')[i].innerHTML;
	while(str)
	{
		i++;
		if(str == string)
			b = true;
		else
			b = false;
		str = document.getElementsByTagName('font')[i].innerHTML;
	}
	if(str == string)
		alert('Yes, it is');
	else
		alert('Can not find');
}

function s(str) {
    var elems = document.getElementsByTagName('font'), i = elems.length;
    while (i-- && elems[i].innerHTML != str);
    alert(i < 0 ? 'Can not find' : 'Yes, it is');
}