document.onkeydown = NavigateThrough;

function NavigateThrough (event)
{
 if (!document.getElementById) return;

 if (window.event) event = window.event;

 if (event.ctrlKey)
 {
 var link = null;
 var href = null;
 switch (event.keyCode ? event.keyCode : event.which ? event.which : null)
 {
 case 0x26:
 link = document.getElementById ('UpLink');
 break;
 case 0x24:
 link = document.getElementById ('HomeLink');
 break;
 case 0x27:
 link = document.getElementById ('NextLink');
 break;
 case 0x25:
 link = document.getElementById ('PrevLink');
 break;
 }

 if (link && link.href) document.location = link.href;
 }
}