var carsearchxmlhttp = createRequest();

function createRequest() {
	var obj;
	var browser = navigator.appName;
	if(browser == "Microsoft Internet Explorer"){
        obj = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        obj = new XMLHttpRequest();
    }
    return obj;
}

/****************************************************/
/*			CONTROL DROPDOWNS						*/
/****************************************************/

function loadSelects(nav)
{
	var location = document.getElementById('location').value;
	var make = document.getElementById('make').value;
	var model = document.getElementById('model').value;
	var trim = document.getElementById('trim').value;
	var body = document.getElementById('body').value;
	
	if (document.getElementById('new').checked){
		var type = 'new';
	}else{
		var type = 'used';
	}
	//var type = document.getElementById('type').value;
	if (document.getElementById('certified').checked){
		var carCertified = 1;
	}else{
		var carCertified = 0;
	}
	
	var request = 'ajax.php?l='+location+'&make='+make+'&model='+model+'&trim='+trim+'&body='+body+'&type='+type+'&c='+carCertified;
	
	if(nav)
	{
		request +="&nav=1";
	}
	
		//alert(request);
	carsearchxmlhttp.open('get',request);
	carsearchxmlhttp.onreadystatechange = loadSelectsResponse;
   	carsearchxmlhttp.send(null);
}

function loadSelectsResponse() {
	if(carsearchxmlhttp.readyState == 4){
		// this is the content of the called page
        var response = carsearchxmlhttp.responseText;

       	//process the response
       	if( response ) {
       		
       		var r = response.split("|");

	       	document.getElementById('make-dd').innerHTML = r[1];
	       	document.getElementById('model-dd').innerHTML = r[3];
	       	document.getElementById('trim-dd').innerHTML = r[5];
	       	//document.getElementById('body-dd').innerHTML = r[7];
	       	document.getElementById('location-dd').innerHTML = r[9];
	       	
       	}
    }
    
    
}