拡大縮小

var pageSize = 4; // 4倍から
var timerID;
document.body.style[“-webkit-transform”]=”scale(“+pageSize+”,”+pageSize+”)”;
window.onload = function(){
timerID = setInterval(“pageScale()”, 25);
}
function pageScale(){
document.getElementById(“result”).innerHTML = “現在の倍率 : “+pageSize;
pageSize = pageSize – 0.05;
if (pageSize < 1) {
document.body.style[“-webkit-transform”]=”scale(0.5,0.5)”;
clearInterval(timerID);
}else{
document.body.style[“-webkit-transform”]=”scale(“+pageSize+”,”+pageSize+”)”;
}
}