function toggle1(){
var name = document.getElementById("html")
if(name.className == "off"){
name.className = "on";
} else {
name.className = "off";
}
} 
function toggle2(){
var name = document.getElementById("body")
if(name.className == "off"){
name.className = "on";
} else {
name.className = "off";
}
} 
function toggle3(){
var name = document.getElementById("wrapper")
if(name.className == "off"){
name.className = "on";
} else {
name.className = "off";
}
}