var delay = 6; // задержка автопрокрутки в секундах
var d_opacity1 = 50; // скорость "пропадания" предыдущего баннера (миллисекунды)
var d_opacity2 = 60; // скорость "появления" следующего баннера (миллисекунды)
var delay2 = 1000; // время (миллисекунды) начала загрузки следующего баннера
var vst = 1, timer;
function doLoadPic(target) {
	    if (vst < 1) return false;
	    vst = 0;
        var preq = new JsHttpRequest();
        preq.onreadystatechange = function() {
            if (preq.readyState == 4) {
                if (preq.responseJS) {
                	if (target != 2)
                	{
                		fadeOpacity('slider', 'opacityOn');
                		clearTimeout(timer);
                		doCyclePics(delay);
                	}
           	        setTimeout('show(\''+preq.responseJS+'\', "'+target+'")', 1000);
                }
            }
        }
        preq.caching = false;
        preq.open('POST', './rot/cnt.php', true);
        preq.send({ target: target });
}
function show(what, target)
{
       	document.getElementById('slider').innerHTML=what;
       	if (target != 2) fadeOpacity('slider', 'opacityOff');
	    	else fadeOpacity('slider', 'opacityOff2');
	    vst = 1;
}
function doCyclePics(st)
{
	if (st == '0') st = delay;
	timer = setInterval('doLoadPic(1)', st*1000);
}


function setElementOpacity(oElem, nOpacity)
{
	var p = getOpacityProperty();
	(setElementOpacity = p=="filter"?new Function('oElem', 'nOpacity', 'nOpacity *= 100;	var oAlpha = oElem.filters["DXImageTransform.Microsoft.alpha"] || oElem.filters.alpha;	if (oAlpha) oAlpha.opacity = nOpacity; else oElem.style.filter += "progid:DXImageTransform.Microsoft.Alpha(opacity="+nOpacity+")";'):p?new Function('oElem', 'nOpacity', 'oElem.style.'+p+' = nOpacity;'):new Function)(oElem, nOpacity);
}

function getOpacityProperty()
{
	var p;
	if (typeof document.body.style.opacity == 'string') p = 'opacity';
	else if (typeof document.body.style.MozOpacity == 'string') p =  'MozOpacity';
	else if (typeof document.body.style.KhtmlOpacity == 'string') p =  'KhtmlOpacity';
	else if (document.body.filters && navigator.appVersion.match(/MSIE ([\d.]+);/)[1]>=5.5) p =  'filter';

	return (getOpacityProperty = new Function("return '"+p+"';"))();
}

function fadeOpacity(sElemId, sRuleName, bBackward)
{
	var elem = document.getElementById(sElemId);
	if (!elem || !getOpacityProperty() || !fadeOpacity.aRules[sRuleName]) return;

	var rule = fadeOpacity.aRules[sRuleName];
	var nOpacity = rule.nStartOpacity;

	if (fadeOpacity.aProc[sElemId]) {clearInterval(fadeOpacity.aProc[sElemId].tId); nOpacity = fadeOpacity.aProc[sElemId].nOpacity;}
	if ((nOpacity==rule.nStartOpacity && bBackward) || (nOpacity==rule.nFinishOpacity && !bBackward)) return;

	fadeOpacity.aProc[sElemId] = {'nOpacity':nOpacity, 'tId':setInterval('fadeOpacity.run("'+sElemId+'")', fadeOpacity.aRules[sRuleName].nDalay), 'sRuleName':sRuleName, 'bBackward':Boolean(bBackward)};
}

fadeOpacity.addRule = function(sRuleName, nStartOpacity, nFinishOpacity, nDalay){fadeOpacity.aRules[sRuleName]={'nStartOpacity':nStartOpacity, 'nFinishOpacity':nFinishOpacity, 'nDalay':(nDalay || 30),'nDSign':(nFinishOpacity-nStartOpacity > 0?1:-1)};};

fadeOpacity.back = function(sElemId){fadeOpacity(sElemId,fadeOpacity.aProc[sElemId].sRuleName,true);};

fadeOpacity.run = function(sElemId)
{
	var proc = fadeOpacity.aProc[sElemId];
	var rule = fadeOpacity.aRules[proc.sRuleName];

	proc.nOpacity = Math.round(( proc.nOpacity + .1*rule.nDSign*(proc.bBackward?-1:1) )*10)/10;
	setElementOpacity(document.getElementById(sElemId), proc.nOpacity);

	if (proc.nOpacity==rule.nStartOpacity || proc.nOpacity==rule.nFinishOpacity) clearInterval(fadeOpacity.aProc[sElemId].tId);
}
fadeOpacity.aProc = {};
fadeOpacity.aRules = {};

// ================================================

fadeOpacity.addRule('opacityOn', 1, 0, d_opacity1);
fadeOpacity.addRule('opacityOff', 0, 1, d_opacity2);
fadeOpacity.addRule('opacityOff2', 0.7, 1, d_opacity2);