var elemIndex = 0;
$(document).keydown(function (e) {
    if(!e) {
        e = window.event;
    }
    switch(e.keyCode) {
    case 37:
        goLeft();
        break;
    case 39:
        goRight();
        break;
    }
});
function goLeft()
{
    elemIndex--;
    if(elemIndex < 0) elemIndex = 0;


    $("#mycarousel a").filter(function(index) {
                          return index == elemIndex;
                        }).click();
}
function goRight()
{
    elemIndex++;
    if(elemIndex >= $("#mycarousel a").size())
        elemIndex = 0;

   
    $("#mycarousel a").filter(function(index) {
                  return index == elemIndex;
                }).click();
}