function toggleLayer(whichLayer)

{
if (document.getElementById)
{
// this is the way the standards work
var style2 = document.getElementById(whichLayer).style;
style2.display = style2.display? "":"block";
}
else if (document.all)
{
// this is the way old msie versions work
var style2 = document.all[whichLayer].style;
style2.display = style2.display? "":"block";
}
else if (document.layers)
{
// this is the way nn4 works
var style2 = document.layers[whichLayer].style;
style2.display = style2.display? "":"block";
}


}


function add(com)

{
	
//alert(com);
var type = document.getElementById('no').value

var rear = document.getElementById('rear').value
var left = document.getElementById('leftside').value
var right = document.getElementById('rightside').value
var cprice = document.getElementById('price').value
var stand = document.getElementById('rack').value
//alert("back "+rear+" | left "+left);

if (cprice ==""){cprice=0;}else{cprice = parseFloat("" + document.getElementById('price').value)}


if (com == "backing"){
if (com == "backing" && type==6 && rear=="on"){var price=-199.00;  document.getElementById('backing').style.display = "none"; }
else if (com == "backing" && type==10 && rear=="on"){var price=-275.00;  document.getElementById('backing').style.display = "none";}
else if (com == "backing" && type==6 && rear=="off"){var price=199.00;  document.getElementById('backing').style.display = "block";}
else if (com == "backing" && type==10 && rear=="off"){var price=275.00;  document.getElementById('backing').style.display = "block";}
if (rear == "off"){rear="on";}	else if (rear == "on") {rear="off"}
document.getElementById('rear').value=rear;
}


if (com == "stand"){
if (com == "stand" && type==6 && stand=="on"){var price=-129.99;  document.getElementById('stand').style.display = "none"; }
else if (com == "stand" && type==10 && stand=="on"){var price=-179.99;  document.getElementById('stand').style.display = "none";}
else if (com == "stand" && type==6 && stand=="off"){var price=129.99;  document.getElementById('stand').style.display = "block";}
else if (com == "stand" && type==10 && stand=="off"){var price=179.99;  document.getElementById('stand').style.display = "block";}
if (stand == "off"){stand="on";}	else if (stand == "on") {stand="off"}
document.getElementById('rack').value=stand;
}

if (com=="left"){
if (com == "left" && left=="on"){var price=-135.00; document.getElementById('left').style.display = "none"; }
else if (com == "left" && left=="off"){var price=135.00; document.getElementById('left').style.display = "block"; }
if (left == "off"){left="on";} else if  (left == "on") {left="off"}
document.getElementById('leftside').value=left;
}

if (com=="right"){
if (com == "right" && right=="on"){var price=-135.00; document.getElementById('right').style.display = "none";  }
else if (com == "right" && right=="off"){var price=135.00; document.getElementById('right').style.display = "block"; }
if (right == "off"){right="on";} else if  (right == "on") {right="off"}
document.getElementById('rightside').value=right;
}



var total=price + cprice;
//alert(price + " " + rear);

total = total.toFixed(2);
document.getElementById('price').value=total;

var displaytotal="Price: £"+total;
document.getElementById("total").innerHTML=displaytotal;

}


function update_price(value){
if (price ==""){price=0;}else{price = parseFloat("" + document.getElementById('price').value)}
}


function update(value)
{
var value =value;
if (value == 620.00){var shelter=6; document.getElementById('total').style.display = "block";
document.getElementById('options').style.display = "block";
}
if (value == 850.00){var shelter=10; document.getElementById('total').style.display = "block";
document.getElementById('options').style.display = "block";}
if (value =="" || value =="Choose Shelter"){var shelter=0; document.getElementById('total').style.display = "none";
document.getElementById('options').style.display = "none";}
//alert(value);

var rear = document.getElementById('rear').value
var left = document.getElementById('leftside').value
var right = document.getElementById('rightside').value
var stand = document.getElementById('rack').value

var price = document.getElementById('price').value
	if (price ==""){price=0;}else{price = parseFloat("" + document.getElementById('price').value)}


value = parseFloat(value);

if (rear == "on" && shelter==10 ){value = value + 275;}
if (rear == "on" && shelter==6 ){value = value + 199;}
if (left == "on" ){value = value + 135;}
if (right == "on" ){value = value + 135;}
if (stand == "on" && shelter==10 ){value = value + 179.99;}
if (stand == "on" && shelter==6 ){value = value + 129.99;}


//alert(value);	
var total="Price: £"+value;
var price = value;
//price = parseFloat("" + document.getElementById('price').value)
//price=price + value;
document.getElementById('price').value=price;
//document.getElementById('leftside').value="off";
//document.getElementById('rear').value="off";

document.getElementById('no').value=shelter;
document.getElementById("total").innerHTML=total
	
}