// JavaScript Document
function dd_changed(ddid){
	var dd = document.getElementById('cat_dd[' + ddid + ']');
	for(var x=0; x < dd.options.length; x++){
		dd.options[x].style.color='';
	}
	var next = parseInt(ddid) + 1;
	for(var x = next; x <= dd_count; x++){
		dd_removecontents(x);
	}
	if (next <= dd_count){
		dd.style.color = '#306fd8';
		dd.options[dd.selectedIndex].style.color = '#306fd8';
		var sel = dd.options[dd.selectedIndex].value;
		dd_getoptions(next,sel);
	}else if(ddid == dd_count){
		document.getElementById('selector').submit();
	}
}

function dd_removecontents(ddid){
	dd = document.getElementById('cat_dd[' + ddid + ']');
	dd.style.color = '';
	for(i = dd.options.length - 1 ; i >= 1 ; i--){
		dd.options[i] = null;
	}
}

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

function nocache(){
	var d = new Date();
	return ((d.getTime())*1)
}

var dd_object = createRequestObject();

function dd_getoptions(ddid,id){
	if ((dd_object.readyState == 0) || (dd_object.readyState == 4)){
		dd_object.abort();
		dd = document.getElementById('cat_dd[' + ddid + ']');
		dd.options[0].text = 'Loading...';
		dd_object.open('get', '/dd_getcategory.php?nocache=' + nocache() + '&id=' + id);
		dd_object.onreadystatechange = new Function("dd_filloptions('" + ddid + "')");
		dd_object.send(null);
	}
}

function dd_filloptions(ddid){
	if(dd_object.readyState == 4){
		if(dd_object.status == 200){
			dd = document.getElementById('cat_dd[' + ddid + ']');
			switch(parseInt(ddid)){
				case 1:
					dd.options[0].text = 'Product Category';
				break;
				case 2:
					dd.options[0].text = 'Product Type';
				break;
				case 3:
					dd.options[0].text = 'Manfacturer';
				break;
				case 4:
					dd.options[0].text = 'Model';
				break;
				case 5:
					dd.options[0].text = 'Engine Size';
				break;
				case 6:
					dd.options[0].text = 'Model Type';
				break;
			}
			
			var responseArray = dd_object.responseText.split("\n");
			for (var x=0; x < responseArray.length; x++){
				var parts = responseArray[x].split(",",2);
				if (parts.length == 2){
					var optn = new Option(parts[1], parts[0]);
					optn.innerHTML = parts[1];
					dd.appendChild(optn);
				}
			}
		}
	}
}