var makesArray = [[6,"BMW"],[8,"Cadillac"],[9,"Chevrolet"],[10,"Chrysler"],[11,"Dodge"],[1,"Ford"],[14,"GMC"],[41,"Hummer"],[16,"Hyundai"],[36,"Jaguar"],[18,"Jeep"],[19,"Kia"],[2,"Lincoln"],[20,"Mazda"],[37,"Mitsubishi"],[21,"Nissan"],[22,"Oldsmobile"],[23,"Plymouth"],[24,"Pontiac"],[26,"Saturn"],[48,"SmartCar"],[28,"Toyota"]];
var modelsArray = [[610,9,"1500"],[216,10,"300"],[87,6,"325i"],[489,28,"4Runner"],[320,16,"Accent"],[1,1,"Aerostar"],[401,22,"Alero"],[34,2,"Aviator"],[362,20,"B-Series Pickup"],[3,1,"Bronco"],[661,11,"Caliber"],[342,18,"Cherokee"],[631,9,"Cobalt"],[36,2,"Continental"],[493,28,"Corolla"],[245,11,"Dakota"],[606,1,"E350"],[617,37,"Eclipse"],[646,1,"Edge"],[166,8,"Escalade"],[8,1,"Escape"],[12,1,"Expedition"],[13,1,"Explorer"],[14,1,"Explorer Sport Trac"],[16,1,"F150"],[17,1,"F250"],[18,1,"F350"],[595,1,"Five Hundred"],[21,1,"Focus"],[22,1,"Freestar"],[594,1,"Freestyle"],[383,21,"Frontier"],[659,48,"FRTWO"],[612,1,"Fusion"],[436,24,"Grand Am"],[250,11,"Grand Caravan"],[437,24,"Grand Prix"],[645,41,"H3"],[459,26,"ION"],[227,10,"LeBaron"],[347,18,"Liberty"],[193,9,"Malibu"],[601,2,"MARK LT"],[364,20,"Mazda3"],[656,2,"MKX"],[642,2,"MKZ"],[440,24,"Montana"],[24,1,"Mustang"],[41,2,"Navigator"],[229,10,"Neon"],[660,11,"Nitro"],[233,10,"PT Cruiser"],[581,11,"Ram"],[27,1,"Ranger"],[353,19,"Rio"],[234,10,"Sebring"],[393,21,"Sentra"],[582,14,"Sierra"],[591,9,"Silverado"],[444,24,"Sunfire"],[28,1,"Taurus"],[215,9,"Venture"],[429,23,"Voyager"],[31,1,"Windstar"],[637,21,"X-Trail"],[632,36,"X-Type"],[604,36,"XJS"],[305,14,"Yukon"]];

function UpdateModels(makeIdentifier) {

	// Update models when a make is selected by the visitor
	modelObject = document.searchForm.ModelID;
	modelObject.options[0] = new Option();
	modelObject.options[0].value = "";
	modelObject.options[0].text = "Any Model";
	modelObject.selectedIndex = 0;

	var makeObject = document.searchForm.MakeID;
	var makeIdentifier = makeObject.options[makeObject.selectedIndex].value;

	var counter = 1;
	if(makeIdentifier != "") {
		for(var i = 0; i < modelsArray.length; i++) {
			if(modelsArray[i][1] == makeIdentifier) {
				modelObject.options[counter] = new Option();
				modelObject.options[counter].value = modelsArray[i][0];
				modelObject.options[counter].text = modelsArray[i][2];
				counter++;
			}
		}
	}

	modelObject.length = counter;
}

var PrevOnLoadFunction;

function SetupSearchForm() {

	// Call previously installed onload handler
	if(PrevOnLoadFunction) {
		PrevOnLoadFunction();
	}

	// Populate the make select box
	var makeObject = document.searchForm.MakeID;
	makeObject.onchange = UpdateModels;
	makeObject.options[0] = new Option();
	makeObject.options[0].value = "";
	makeObject.options[0].text = "Any Make";
	for(var i = 0; i < makesArray.length; i++) {
		makeObject.options[i+1] = new Option();
		makeObject.options[i+1].value = makesArray[i][0];
		makeObject.options[i+1].text = makesArray[i][1];
	}
	makeObject.length = makesArray.length + 1;
	makeObject.selectedIndex = 0;

	// Populate the model select box
	var modelObject = document.searchForm.ModelID;
	modelObject.options[0] = new Option();
	modelObject.options[0].value = "";
	modelObject.options[0].text = "Any Model";
	modelObject.length = 1;
	modelObject.selectedIndex = 0;
}

PrevOnLoadFunction = window.onload;
window.onload = SetupSearchForm;