如何设置button控件的快捷键是ctrl+Z

怎么设置button控件的快捷键是ctrl+Z
若是accessKey= "Z "的话，快捷键是alt+z，所以大家帮帮忙

------解决方案--------------------------------------------------------
document.onkeydown = function(){ if(event.ctrlKey && String.fromCharCode(event.keyCode) == "Z ") { document.getElementById( "button1 ").click(); }}
------解决方案--------------------------------------------------------
mark
------解决方案--------------------------------------------------------
<input type=submit accessKey= "Z " value=提交(Alt+Z)>
------解决方案--------------------------------------------------------
liuyun1987(流云拂碧)正解，试了下，ok！
------解决方案--------------------------------------------------------
document.onkeydown = function()
{
if(event.ctrlKey && String.fromCharCode(event.keyCode) == "Z ")
{
document.getElementById( "button1 ").click();
}
}
这个绝对OK的!!!