document.execCommand(打开,保存,打印,另存为)

opensaveasprintselectall

 

<button onclick=document.execCommand("open")>open</button><br>
<button onclick=document.execCommand("saveas")>saveas</button><br>
<button onclick=document.execCommand("print")>print</button><br>
<button onclick=document.execCommand("selectall")>selectall</button>