function get_element(id)
{
	itm = null;
	if (document.getElementById)	{
		itm = document.getElementById(id);
	}else if (document.all){
		itm = document.all[id];
	}else if (document.layers){
		itm = document.layers[id];
	}
	return itm;
}

function str_replace(search, replace, subject) {
    return subject.split(search).join(replace);
}