var n;
var v;
var max;
var maxvideo;

n = 1;
v = 1;
max = 5;
maxvideo = 5;



function changevideo(z) {
if(z == 'm') {
	if(v == 1) { v = maxvideo; v++; }
	if(v > 0) v--;
	}

if(z == 'p') {
	if(v == maxvideo) v = 0;
	if(v < maxvideo) v++;
	}


if(v != '1') video1.style.display = 'none'; else video1.style.display = '';
if(v != '2') video2.style.display = 'none'; else video2.style.display = '';
if(v != '3') video3.style.display = 'none'; else video3.style.display = '';
if(v != '4') video4.style.display = 'none'; else video4.style.display = '';
if(v != '5') video5.style.display = 'none'; else video5.style.display = '';
}

function change(z) {
if(z == 'm') {
	if(n == 1) { n = max; n++; }
	if(n > 0) n--;
	}

if(z == 'p') {
	if(n == max) n = 0;
	if(n < max) n++;
	}


iphone.src = 'images/iphone' + n + '.png';
sum(n);
}

function sum(b) {
	n = b;
	allsoff(n);
	allboff();
	b++;
	b++;
	b++;


	document.images[b].src = 'images/a.png';
	iphone.src = 'images/iphone' + n + '.png';
}


function allboff() {
	document.images[4].src = 'images/p.png';
	document.images[5].src = 'images/p.png';
	document.images[6].src = 'images/p.png';
	document.images[7].src = 'images/p.png';
	document.images[8].src = 'images/p.png';
}

function allsoff(n) {

if(n != '1') ss1.style.display = 'none'; else ss1.style.display = '';
if(n != '2') ss2.style.display = 'none'; else ss2.style.display = '';
if(n != '3') ss3.style.display = 'none'; else ss3.style.display = '';
if(n != '4') ss4.style.display = 'none'; else ss4.style.display = '';
if(n != '5') ss5.style.display = 'none'; else ss5.style.display = '';
}



function fixPNG(element) 
{
 if (navigator.appName == "Microsoft Internet Explorer") {
  var src;

  if (element.tagName=='IMG') {
   if (/\.png$/.test(element.src)) {
    src = element.src;
    element.src = "images/blank.gif";
   }
  }
  else {
   src = element.currentStyle.backgroundImage.match(/url\("(.+\.png)"\)/i)
   if (src) {
    src = src[1];
    element.runtimeStyle.backgroundImage="none";
   }
  }

  if (src) {
   element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "',sizingMethod='scale')";
  }
 }
}