window.GET = function(name) {
 var query = window.location.search.substring(1);
 var vars = query.split('&');
 for(var i = 0; i < vars.length; ++i) {
 var pair = vars[i].split('=');
 if(pair[0] == name) return pair[1];
 }
 return null;
};

onload_ = window.onload;

window.onload = function() {
 var from = GET('id');
 if (from) createCookie('id', from, 0);
 var fromx = from || readCookie('id');
 if (fromx && document.getElementById('form_sms'))
 	document.getElementById('form_sms').innerHTML +=
 	'<input type="hidden" name="id" value="' + fromx + '" />';
 if (onload_) onload_();
};

function createCookie(name,value,days) {
 if (days) {
 var date = new Date();
 date.setTime(date.getTime()+(days*24*60*60*1000));
 var expires = "; expires="+date.toGMTString();
 }
 else var expires = "";
 document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
 var nameEQ = name + "=";
 var ca = document.cookie.split(';');
 for(var i=0;i < ca.length;i++) {
 var c = ca[i];
 while (c.charAt(0)==' ') c = c.substring(1,c.length);
 if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
 }
 return null;
}