var idPrev = "paging_prev";
var idNext = "paging_next";
document.onkeypress = keyShortCut;

function getObjStr(objId) {
   if(document.all && document.all(objId)){ return document.all(objId); }
    else if(document.getElementById && document.getElementById(objId)){ return document.getElementById(objId); }
}
function getKeyCode(ky) {
	if(document.all) { return event.keyCode; }
	else if(document.getElementById) { return (ky.keyCode!=0)? ky.keyCode : ky.charCode; } 
}
function cancelShortCut(e) {
	if(document.all){ var oj = event.target || event.srcElement; }
	else if(document.getElementById) { var oj = e.target || e.srcElement; }
	if (oj.tagName.toLowerCase() == "input") { return true; }
	if (oj.tagName.toLowerCase() == "select") { return true; }
	if (oj.tagName.toLowerCase() == "textarea") { return true; }
}

function keyShortCut(e) {
	if ( cancelShortCut(e) ) { return true; }
	switch (getKeyCode(e)) { 
		case 98:
		case 66:
			var ojid = getObjStr(idPrev);
			if (ojid) { ojid.className = "article_leaf_paging_prev article_leaf_paging_prev_sc"; location.href = ojid.href; }
			break;	
		case 110:
		case 78:
			var ojid = getObjStr(idNext);
			if (ojid) { ojid.className = "article_leaf_paging_next article_leaf_paging_next_sc"; location.href = ojid.href; }
			break;
		default:
	} 
}