用enter键模拟Tab，给按钮设置快捷键
document.onkeydown=function()
{
if(event.keyCode==113)
{
document.getElementById("Button1").click();
}
if(document.activeElement.id=="Button1")
{
document.getElementById("Button1").click();
}
}
function KeyDown()
{
var keycode=event.keyCode;
var keychar=String.fromCharCode(keycode);
if(keycode==13)
{
event.keyCode=9;
}
}
document.onKeyDown=keyDown;
<body onkeydown="KeyDown()"> 注意：这个很重要
