opera = (navigator.userAgent.indexOf('Opera') >= 0)? true : false;
dom = (document.getElementById)? true : false;
ie4 = (document.all && !dom)? true : false;
nn4 = (document.layers)? true : false;



function showElem(elemId)
{
	if (dom) document.getElementById(elemId).style.visibility = "visible";
	else if (ie4) document.all[elemId].style.visibility = "visible";
	else if (nn4) document.layers[elemId].visibility = "show";
}
function hideElem(elemId)
{
	if (dom) document.getElementById(elemId).style.visibility = "hidden";
	else if (ie4) document.all[elemId].style.visibility = "hidden";
	else if (nn4) document.layers[elemId].visibility = "hide";
}
function putElem(elemId) {
	if (dom) document.getElementById(elemId).style.display = "block";
	else if (ie4) document.all[elemId].style.display = "block";
}
function removeElem(elemId) {
	if (dom) document.getElementById(elemId).style.display = "none";
	else if (ie4) document.all[elemId].style.display = "none";
}


function getElement( elemId )
{
    if (dom)
        return document.getElementById(elemId);
    else
        if (ie4)
            return document.all[elemId];
        else
            if (nn4)
                return document.layers[elemId];
    return null;
}


function register(e) {

    var code;
    if (!e) e = window.event;
    if (e.keyCode) code = e.keyCode;
      else if (e.which) code = e.which;

    if ((code == 37) && (e.ctrlKey == true)) {
    
        var destination = document.getElementById('previous_page');
        if (destination) location.href = destination.href;
    }
    if ((code == 39) && (e.ctrlKey == true)) {
    
    	var destination = document.getElementById('next_page');
        if (destination) location.href = destination.href;
    }
}
lmm = new Image(); lmm.src = "/pictures/-.gif";

lmp = new Image(); lmp.src = "/pictures/+.gif";

function ShowHideLMP(id){
	if (getElement('podmenu'+id).style.display=='block'){
		getElement('podmenu'+id).style.display='none';
		document.images['ilmp'].src=lmp.src;
		getElement('almp').title='Раскрыть подменю';
	}
	else {
		getElement('podmenu'+id).style.display='block';
		document.images['ilmp'].src=lmm.src;
		getElement('almp').title='Скрыть подменю';
	}

}