userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
mustInitImg = true;
var preloadFlag = true;

function initImgID() {
  var di = document.images; 
  if (mustInitImg && di) { 
    for (var i=0; i<di.length; i++) { 
      if (!di[i].id) di[i].id=di[i].name; 
    } 
    mustInitImg = false;
  }
}

function findElement(n,ly) {	
  var d = document;	
  if (browserVers < 4) return d[n];	
  if ((browserVers >= 6) && (d.getElementById)) {
    initImgID; 
    return(d.getElementById(n))
  }; 	
  var cd = ly ? ly.document : d;	
  var elem = cd[n];	
  if (!elem) {		
    for (var i=0;i<cd.layers.length;i++) {			
      elem = findElement(n,cd.layers[i]);			
      if (elem) return elem;		
    }	
  }	
  return elem;
}

function changeImagesArray(array) {	
  if (preloadFlag == true) {		
    var d = document; 
    var img;		
    for (i=0;i<array.length;i+=2) {			
      img = null; 
      var n = array[i];			
      if (d.images) {				
        if (d.layers) {
          img = findElement(n,0);
        }	else {
          img = d.images[n];
        }			
      }			
      if (!img && d.getElementById) {img = d.getElementById(n);}			
      if (!img && d.getElementsByName) {
        var elms = d.getElementsByName(n);				
        if (elms) {					
          for (j=0;j<elms.length;j++) {						
            if (elms[j].src) {img = elms[j]; break;}					
          }				
        }			
      }			
      if (img) {img.src = array[i+1];}		
    }	
  }
}

function changeImages() {	
  changeImagesArray(changeImages.arguments);
}

function changeProducts(pid, ptotal) {	
  for(i=1; i<=ptotal; i++) {
    document.getElementById('product_'+i).className = 'hide';
  }
  document.getElementById('product_'+pid).className = '';
  
}