function voipRates(thisname, letter) {
tr=document.getElementsByTagName('tr');

	for (i=0;i<tr.length;i++){
		if(tr[i].getAttribute(thisname)!=null){
			if (tr[i].getAttribute(thisname)==("fred"+letter)){
				tr[i].style.display = '';
			}else{
				tr[i].style.display = 'none';
			}
			if(letter=="ALL"){
				tr[i].style.display = '';
			}
		}
	}
}