function sms ( mailaddress )
{
var thiscat = document.forms[0].thiscat.value;
var thiscat2 = document.forms[0].thiscat2.value;
var prefix = document.forms[0].db.value;
var pos = prefix.lastIndexOf ( "/" );

var url = "/" + prefix.substring(0,pos) + "/hpi.nsf/sms?openform&sendto="+mailaddress+"&restricttocategory=" + thiscat+"~"+thiscat2;

window.location.href = url;

}