function showvp() {
 var rc = window.showModalDialog('chooseproduct.php','','dialogWidth=420px;dialogHeight=320px;menu=0;toolbar=0;resizable=0;location=0;status=0');
 if(rc!=null)window.open(rc,'_self');
}
var currBanner = 0;
var switchTimeout = 10000;
var fadeTimeout = 10;
var mainBanners = [
 ['bn1.jpg','products.php'],
 ['bn2.jpg','solutions.php'],
 ['bn3.jpg','products.php'],
];

function setOpacity(el,v) {
 el.style.opacity = v;
 el.style.filter = 'alpha(opacity='+ parseInt(v*100)+ ');';
}

function switchVisi(opacity) {
 var container = document.getElementById('mainb');
 if(opacity<1.0) {
  opacity+=0.1;
  setOpacity(container,opacity);
  window.setTimeout('switchVisi('+opacity+')',fadeTimeout);
 }
}
function switchFader(opacity) {
 var container = document.getElementById('mainb');
 if(opacity>0.2) {
  opacity-=0.1;
  setOpacity(container,opacity);
  window.setTimeout('switchFader('+opacity+')',fadeTimeout);
 } else {
  container.innerHTML = '<a href="'+mainBanners[currBanner][1]+'"><img src="img/'+mainBanners[currBanner][0]+'" width=550 height=200 alt="" border=0>';
  window.setTimeout('switchVisi('+opacity+')',fadeTimeout);
 }
}

function switchBanner() {
 currBanner++;
 if(typeof(mainBanners[currBanner])=='undefined')
  currBanner = 0;
 if(typeof(mainBanners[currBanner])=='undefined')
  return;
 var container = document.getElementById('mainb');
 if(typeof(container)=='undefined')
  return;
 window.setTimeout('switchFader(1.0)',10);
 window.setTimeout('switchBanner()',switchTimeout);
}

window.setTimeout('switchBanner()',switchTimeout);