document.onkeydown = KeyDownFunc;
var lnkCtrlPrev,lnkCtrlNext;
function KeyDownFunc(evnt) 
{

    if (!evnt) evnt = window.event;
    var key = evnt.keyCode;
    if (evnt.ctrlKey) 
    {
        var lnk;
        if (key == 37&&lnkCtrlPrev) 
        {
          document.location=lnkCtrlPrev;
        }
        if (key == 39&&lnkCtrlNext) 
        {
          document.location=lnkCtrlNext;
        }
    }
}