function seo_string(field_name,str,dirlist,dirchk)
{
	dir_pat=RegExp("^("+dirlist.replace(/,/g,"|")+")$","i");
	dir_str=dirlist.replace(/,/g,", ");
//	if(str.match(/^[^a-zA-Z]|[^a-zA-Z0-9_\-]|[^a-zA-Z]$/))
	if(str.match(/[&\/\? \.]/))
		return (''+field_name+' must not contain &/? . characters');
	else if(dirchk==true && str.match(dir_pat) )
		return ('This value of '+field_name+' is not allowed. Try appending / removing some characters to the value');
	else
		return false;	
}


function sbconvert_toseo(title,seo)
{
	a=title.value.replace(/^[^a-zA-Z]+/,"");
	a=a.replace(/[^a-zA-Z0-9_\-]+/g,"_");
	a=a.replace(/[^a-zA-Z]+$/,"");
	seo.value=a;
}