/*****
Image Cross Fade Redux
Version 1.0
Last revision: 02.15.2006
steve@slayeroffice.com
Please leave this notice intact. 
Rewrite of old code found here: http://slayeroffice.com/code/imageCrossFade/index.html
*****/

window.addEventListener?window.addEventListener("load",so_init,false):window.attachEvent("onload",so_init);

var d=document, imgs = new Array(), zInterval = null, current=0, pause=false;
var myDivWidth, myDivHeight;

function toggleStartStop() {
        mydiv = d.getElementById("rotator");
        if (mydiv) {
                imgs = mydiv.getElementsByTagName("img");
                if (imgs[0]) {
                        if (pause == true) {
                                pause = false;
                                setTimeout(so_xfade,50);
                        } else {
                                pause = true;
                                setTimeout(checkIfPiclensIsRunning,1000);
                        }
                }
        }
}

function checkIfPiclensIsRunning() {
        if (PicLensLite.piclensIsRunning_ == true) {
                setTimeout(checkIfPiclensIsRunning,1000);
        } else {
                toggleStartStop();
        }
}

function so_init() {
        if(!d.getElementById || !d.createElement)return;

        mydiv = d.getElementById("rotator");

        if (mydiv) {
                imgs = mydiv.getElementsByTagName("img");

        // set the 4:3 height
        myDivWidth = mydiv.offsetWidth;
        myDivHeight = Math.round(myDivWidth * 0.75);
        mydiv.style.height = myDivHeight + 'px';
    
        myNoImgDiv = d.getElementById("noImages");
        if (myNoImgDiv) {
                myNoImgDivW = myNoImgDiv.offsetWidth;
                myNoImgDivH = Math.round(myNoImgDivW * 0.75);
                myNoImgDiv.style.height = myNoImgDivH + 'px';
        }
    
        if (imgs[0]) {
                for(i=0;i<imgs.length;i++) {
                        imgs[i].xOpacity = 0;
        
                        // get the image w&h
                        iImageWidth = imgs[i].width;
                        iImageHeight = imgs[i].height;
        
                        if (iImageWidth > 1000) {
                                fudgeFactor = 0.01;
                        } else {
                                fudgeFactor = 0.1;
                        }
        
                        // find the w&h multiplier, round down.
                        var widthMultiplier = (myDivWidth-2) / iImageWidth;
                        var heightMultiplier = (myDivHeight-2) / iImageHeight;
                        var wMulti = widthMultiplier.toFixed(2) - fudgeFactor;
                        var hMulti = heightMultiplier.toFixed(2);
        
                        // pick the lesser of the two.
                        if (wMulti > hMulti) {
                                var multiplier = hMulti;
                                var nShift = 2;
                        } else {
                                var multiplier = wMulti;
                                var nShift = 2;
                        }
        
                        imgs[i].width = Math.floor(iImageWidth * multiplier);
                        imgs[i].height = Math.floor(iImageHeight * multiplier);
        
                        wWhiteSpace = myDivWidth - imgs[i].width;
                        hWhiteSpace = myDivHeight - imgs[i].height;
        
                        topSpace = Math.round(hWhiteSpace/2)+2;
                        leftSpace = Math.round(wWhiteSpace/2)-5;
        
                        imgs[i].style.display = "none";
                        imgs[i].style.position = "absolute";
                        imgs[i].style.top = topSpace + "px";
                        imgs[i].style.left = leftSpace + "px";
                        
                }
                imgs[0].style.display = "block";
                imgs[0].xOpacity = .99;
    
                setTimeout(so_xfade,4000);
        }
        }
}

function so_xfade() {
        var cOpacity = imgs[current].xOpacity;
        var nIndex = imgs[current+1]?current+1:0;
        var nOpacity = imgs[nIndex].xOpacity;
        
        if (pause) {
                return;
        }
        
        cOpacity-=.05; 
        nOpacity+=.05;
        
        imgs[nIndex].style.display = "block";
        imgs[current].xOpacity = cOpacity;
        imgs[nIndex].xOpacity = nOpacity;
        
        setOpacity(imgs[current]); 
        setOpacity(imgs[nIndex]);
        
        if(cOpacity<=0) {
                imgs[current].style.display = "none";
                current = nIndex;
                setTimeout(so_xfade,4000);
        } else {
                setTimeout(so_xfade,50);
        }
        
        function setOpacity(obj) {
                if(obj.xOpacity>.99) {
                        obj.xOpacity = .99;
                        return;
                }
                obj.style.opacity = obj.xOpacity;
                obj.style.MozOpacity = obj.xOpacity;
                obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
        }
        
}