document.onkeyup = KeyCheck;
function KeyCheck(e)
{
var KeyID = (window.event) ? event.keyCode : e.keyCode;
switch(KeyID)
{
case 97:
window.location = "/";
break;

case 98:
window.location = "/cache/";
break;

case 99:
window.location = "/about/";
break;

case 100:
window.location = "/contact/";
break;

case 49:
window.location = "/";
break;

case 50:
window.location = "/cache/";
break;

case 51:
window.location = "/about/";
break;

case 52:
window.location = "/contact/";
break;
}
}