function mainNavPreload(){
	var nav_item_1 = new Image(108,32);
	nav_item_1.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_1_2.gif";
       var nav_item_2 = new Image(142,32);
	nav_item_2.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_2_2.gif";
       var nav_item_3 = new Image(96,32);
	nav_item_3.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_3_2.gif";
       var nav_item_4 = new Image(86,32);
	nav_item_4.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_4_2.gif";
       var nav_item_5 = new Image(74,32);
	nav_item_5.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_5_2.gif";
       var nav_item_6 = new Image(112,32);
	nav_item_6.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_6_2.gif";
       var nav_item_7 = new Image(108,32);
	nav_item_7.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_7_2.gif";
       var nav_item_8 = new Image(118,32);
	nav_item_8.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_8_2.gif";
       var nav_item_9 = new Image(119,32);
	nav_item_9.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_9_2.gif";
       var nav_item_10 = new Image(30,32);
	nav_item_10.src = "http://www.pentagon-group.co.uk/nav_new/nav_item_10_2.gif";
	var nav_sub_ar = new Image(15,7);
	nav_sub_ar.src = "http://www.pentagon-group.co.uk/nav_new/sub_ar.gif";

	var web_offers = new Image(169,21);
	web_offers.src = "http://www.pentagon-group.co.uk/images/quickbuttons/weboffers2.gif";
    var brochure_request = new Image(169,21);
	brochure_request.src = "http://www.pentagon-group.co.uk/images/quickbuttons/brochure_request2.gif";
    var how_do_i_buy = new Image(169,21);
	how_do_i_buy.src = "http://www.pentagon-group.co.uk/images/quickbuttons/how_do_i_buy2.gif";
    var part_exchange = new Image(169,21);
	part_exchange.src = "http://www.pentagon-group.co.uk/images/quickbuttons/part_exchange2.gif";
    var pentagon_finance = new Image(169,21);
	pentagon_finance.src = "http://www.pentagon-group.co.uk/images/quickbuttons/pentagon_finance2.gif";
    var book_service = new Image(169,21);
	book_service.src = "http://www.pentagon-group.co.uk/images/quickbuttons/book_service2.gif";
    var faqs = new Image(169,21);
	faqs.src = "http://www.pentagon-group.co.uk/images/quickbuttons/faqs2.gif";
}

function mainNavSwap(item,disp){
	if(disp == 1){
		document["nav_item_"+item].src = "http://www.pentagon-group.co.uk/nav_new/nav_item_"+item+"_2.gif";
	}else{
		document["nav_item_"+item].src = "http://www.pentagon-group.co.uk/nav_new/nav_item_"+item+"_1.gif";
	}
}

function mainInsSwap(disp){
	if(disp == 1){
		document["nav_item_Ins"].src = "http://www.pentagon-group.co.uk/nav_new/insurance_over.gif";
	}else{
		document["nav_item_Ins"].src = "http://www.pentagon-group.co.uk/nav_new/insurance.gif";
	}
}

function mainNavList(item,disp,showsel){
    var browser=navigator.appName;
	var version=navigator.appVersion;
	var detect_version = version.indexOf("MSIE 6.0");
	if(browser == "Microsoft Internet Explorer" && detect_version != -1 && detect_version < 20 && showsel != 1){
		var hidesels = true;
	}else{
		var hidesels = false;
	}

	if(disp == 1){
		document.getElementById("main_nav_list_"+item).style.display = "";
		if(hidesels == true){
			if(item == 1 || item == 2){ mainNavHideSearch(item,0); }
		}
	}else{
		document.getElementById("main_nav_list_"+item).style.display = "none";
		if(hidesels == true){
			if(item == 1 || item == 2){ mainNavHideSearch(item,1); }
		}
	}
	mainNavSwap(item,disp);
}

   function mainNavSublist(item,subitem,disp){
       if(disp == 1){
		document.getElementById("main_nav_sublist_"+item+"_"+subitem).style.display = "";
		document.getElementById("main_nav_list_item_"+item+"_"+subitem).className = "main_nav_list_item main_nav_list_item_sel";
	}else{
		document.getElementById("main_nav_sublist_"+item+"_"+subitem).style.display = "none";
		document.getElementById("main_nav_list_item_"+item+"_"+subitem).className = "main_nav_list_item";
	}
}

function mainNavHideSearch(item,disp){
	if(disp == 1){
		//Used search box:
		document.getElementById("make").style.display = "";
		document.getElementById("model").style.display = "";
		if(item == 1){
			document.getElementById("price").style.display = "";
			document.getElementById("mileage").style.display = "";
		}

		//New search box:
        document.getElementById("new_make").style.display = "";
		document.getElementById("new_model").style.display = "";
        if(item == 1){
			document.getElementById("new_trim").style.display = "";
			document.getElementById("new_mpg").style.display = "";
			document.getElementById("new_co2").style.display = "";
		}
	}else{
		//Used search box:
    	document.getElementById("make").style.display = "none";
		document.getElementById("model").style.display = "none";
		if(item == 1){
			document.getElementById("price").style.display = "none";
			document.getElementById("mileage").style.display = "none";
		}

		//New search box:
        document.getElementById("new_make").style.display = "none";
		document.getElementById("new_model").style.display = "none";
        if(item == 1){
			document.getElementById("new_trim").style.display = "none";
			document.getElementById("new_mpg").style.display = "none";
			document.getElementById("new_co2").style.display = "none";
		}
	}
}