function readID() {
var expDays = 90;
// number of days the cookie should last
var expDate = new Date();
expDate.setTime(expDate.getTime() +  (24 * 60 * 60 * 1000 * expDays)); 
var ref_id = GetCookie('ref_id');
if (ref_id == null || ref_id == 'noId') {
if (location.search.length > 1) ref_id = location.search.substring(1, location.search.length);
else ref_id = 'noId';
if (ref_id != GetCookie('ref_id')) SetCookie('ref_id', ref_id, expDate, '/');
}

// You can change the FORM location below
// where the referral ID is stored on your page
// You then access this element to get the ID

document.trucking_insurance_quote.ref_id.value = ref_id;
}

function getCookieVal(offset) {  
var endstr = document.cookie.indexOf (';', offset);  
if (endstr == -1)    
endstr = document.cookie.length;  
return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie(name) {  
var arg = name + '=';  
var alen = arg.length;  
var clen = document.cookie.length;  
var i = 0;  
while (i < clen) {    
var j = i + alen;    
if (document.cookie.substring(i, j) == arg)      
return getCookieVal (j);    
i = document.cookie.indexOf(' ', i) + 1;    
if (i == 0) break;   
}
return null;
}

function SetCookie(name, value) {
var argv = SetCookie.arguments;  
var argc = SetCookie.arguments.length;  
var expires = (argc > 2) ? argv[2] : null;  
var path = (argc > 3) ? argv[3] : null;  
var domain = (argc > 4) ? argv[4] : null;  
var secure = (argc > 5) ? argv[5] : false;  
document.cookie = name + '=' + escape (value) + 
((expires == null) ? '' : ('; expires=' + expires.toGMTString())) + 
((path == null) ? '' : ('; path=' + path)) +  
((domain == null) ? '' : ('; domain=' + domain)) +    
((secure == true) ? '; secure' : '');
}