5.7 打开新窗口
window.open()
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="refresh" content="20">
<script>
function newWindow() {
var catWindow = window.open("src/test_on.png", "catWin", "resizable=no,width=350,height=260");
}
</script>
</head>
<body>
<button onclick="newWindow()">点击</button>
</body>
</html>