function getQueryStrings() {
    var argList = new Object();
    if(window.location != null && window.location.search.length > 1) {
        var urlParms = window.location.search.substring(1);
        var argPairs = urlParms.split('&');	
        for(var i = 0; i < argPairs.length; i++) {
            var pos = argPairs[i].indexOf('=')

            if(pos == -1)
                continue;
            else {
                var argName = argPairs[i].substring(0, pos);
                var argVal = argPairs[i].substring(pos + 1);

                if(argVal.indexOf('+') != -1)
                    argVal = argVal.replace(/\+/g, ' ');

                argList[argName] = unescape(argVal);
            }
        }
    }
    return argList;
}
	window.onload = function() {
    var queryStrings = getQueryStrings();
    for(var prop in queryStrings) {
		if(prop == 'modelyears'){
			for (i=0; i <= document.risk.modelyears.options.length - 1; i++) {
				if (queryStrings[prop] == document.risk.modelyears.options[i].value) {
					document.risk.modelyears.options[i].selected = true;
					break;
				}			
			}
		}
		if(prop == 'warranty'){
			for (i=0; i <= document.risk.warranty.options.length - 1; i++) {
				if (queryStrings[prop] == document.risk.warranty.options[i].value) {
					document.risk.warranty.options[i].selected = true;
					break;
				}			
			}
		}	
		if(prop == 'years'){
			for (i=0; i <= document.risk.years.options.length - 1; i++) {
				if (queryStrings[prop] == document.risk.years.options[i].value) {
					document.risk.years.options[i].selected = true;
					break;
				}			
			}
		}
		if(prop == 'miles'){
			for (i=0; i <= document.risk.miles.options.length - 1; i++) {
				if (queryStrings[prop] == document.risk.miles.options[i].value) {
					document.risk.miles.options[i].selected = true;
					break;
				}			
			}
		}					
		dorisk();
    }	
}