var curopacity = 100;
var intervalid = 0;
var qsParm = new Array();
function qs() {
  var query = window.location.search.substring(1);
  var parms = query.split('&');
  for (var i=0; i<parms.length; i++) {
    var pos = parms[i].indexOf('=');
    if (pos > 0) {
      var key = parms[i].substring(0,pos);
      var val = parms[i].substring(pos+1);
      qsParm[key] = val;
    }
  }

  if (qsParm['showImage']) {
    eval('currentImage = ' + qsParm['showImage'] + ';');
  }
}

function show(showImage) {
  currentImage = showImage;
  var prevImage = currentImage;
  var nextImage = currentImage;

  if (currentImage == 0) {
    prevImage = numberOfImages;
  }
  else {
    prevImage = currentImage-1;
  }
  if (currentImage == numberOfImages) {
    nextImage = 0;
  }
  else {
    nextImage = currentImage+1;
  }

  blendimage("portfolio","galleryimage",designGalleryImages[currentImage].src,200);
}

function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;
    var finalvalue = opacStart;
    lastOpac = opacStart;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
    
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    opacity = (opacity == 100)?99:opacity;
    
    object.opacity = (opacity / 100-.001);
    object.MozOpacity = (opacity / 100-.001);
    object.KhtmlOpacity = (opacity / 100-.001);
    object.filter = "alpha(opacity=" + opacity + ")";
} 

function blendimage(divid, imageid, imagefile, millisec) { 
    var speed = Math.round(millisec / 100); 
    var timer = 0; 
    var objImage = document.getElementById(imageid);
     
    //set the current image as background 
    document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")"; 

//   objImage.style.visibility = 'hidden';
//   objImage.src = "";
     
    objImage.src = imagefile;

    changeOpac(0, imageid);

    //fade in image 
    for(i = 0; i <= 100; i++) { 
        setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed)); 
        timer++; 
    } 
}