//	start page with step 2 & 3 hidden
	document.getElementById("step2").style.display = "none";
	document.getElementById("step3").style.display = "none";
	
	var selectColor = "#c4df9b";
	var BYpart=0; var BYkw=0;
	var BYwire=0; var BYnon=0; var BYall=0;
	
//	if page is 1st loaded, reset all cookies, otherwise, detect selections
	if (document.referrer != location.href) {
		linkAction(0,0,0,0,0);
	}
	else {
		fillvars();
		linkAction(BYpart,BYkw,BYwire,BYnon,BYall);
	}

function linkAction(bypart, bykw, bywire, bynon,byall) {
	setCookie('BYpart',bypart); 
	setCookie('BYkw',bykw);
	setCookie('BYwire',bywire); 
	setCookie('BYnon',bynon);
	setCookie('BYall',byall);
	fillvars();
	showhide();
}

function showhide() {
	if (BYpart == 1) {
		document.getElementById("step2").style.display = "";
		document.getElementById("stp12").style.display = "";
		document.getElementById("stp22").style.display = "none";
		document.getElementById("step3").style.display = "none";
		document.getElementById("BYpart").style.backgroundColor = selectColor;
		document.getElementById("BYkw").style.backgroundColor = "";
	}
	if (BYkw == 1) {
		document.getElementById("step2").style.display = "";
		document.getElementById("stp22").style.display = "";
		document.getElementById("stp12").style.display = "none";
		document.getElementById("BYpart").style.backgroundColor = "";
		document.getElementById("BYkw").style.backgroundColor = selectColor;
		document.getElementById("BYwire").style.backgroundColor = "";
		document.getElementById("BYnon").style.backgroundColor = "";
		document.getElementById("BYall").style.backgroundColor = "";

		if (BYwire == 1 || BYnon == 1 || BYall == 1) {
			document.getElementById("step3").style.display = "";
		}
		else {
			document.getElementById("step3").style.display = "none";
		}
		
		if (BYwire == 1) {
			document.getElementById("stp31").style.display = "";
			document.getElementById("stp32").style.display = "none";
			document.getElementById("stp33").style.display = "none";
			document.getElementById("BYwire").style.backgroundColor = selectColor;
			document.getElementById("BYnon").style.backgroundColor = "";
			document.getElementById("BYall").style.backgroundColor = "";
		}
		if (BYnon == 1) {
			document.getElementById("stp31").style.display = "none";
			document.getElementById("stp32").style.display = "";
			document.getElementById("stp33").style.display = "none";
			document.getElementById("BYwire").style.backgroundColor = "";
			document.getElementById("BYnon").style.backgroundColor = selectColor;
			document.getElementById("BYall").style.backgroundColor = "";
		}
		if (BYall == 1) {
			document.getElementById("stp31").style.display = "none";
			document.getElementById("stp32").style.display = "none";
			document.getElementById("stp33").style.display = "";
			document.getElementById("BYwire").style.backgroundColor = "";
			document.getElementById("BYnon").style.backgroundColor = "";
			document.getElementById("BYall").style.backgroundColor = selectColor;
		}
	}
}

function fillvars() {	
	BYpart=getCookie('BYpart');
	BYkw=getCookie('BYkw');
	BYwire=getCookie('BYwire');
	BYnon=getCookie('BYnon');
	BYall=getCookie('BYall');
}

function setCookie(c_name,value) {
	var exdate=new Date()
	exdate.setMinutes(exdate.getMinutes()+10);//set cookie to expire in 20 minutes
	document.cookie=c_name+ "=" +escape(value)+	(";expires="+exdate.toGMTString())
}
function getCookie(c_name) {
	if (document.cookie.length>0)
	  {
	  c_start=document.cookie.indexOf(c_name + "=")
	  if (c_start!=-1)
	    { 
	    c_start=c_start + c_name.length+1 
	    c_end=document.cookie.indexOf(";",c_start)
	    if (c_end==-1) c_end=document.cookie.length
	    return unescape(document.cookie.substring(c_start,c_end))
	    } 
	  }
	return 0
}