〃小豬σ的部落格

var _dom=(document.all?3:(document.getElementById?1:(document.layers?2:0)));
var fireLay="";
for (i=0; i<fireNo*wa; i++) {
    if (_dom == 1 || _dom == 3) {
        fireLay += '<DIV id="fire' + i + '" style="position:absolute; width:1px; height:1px left:-100px; top=-100px;"><IMG src="' + img + '"></DIV>';
    }
    if (_dom == 2) {
        fireLay += '<LAYER name="fire'+ i +'" left="-100" top="-100"><IMG src="' + img + '"></LAYER>\n';
    }
}
document.writeln(fireLay);

function getWindowSize() {
    if(_dom == 1 || _dom == 2) {
        win_width = self.innerWidth;
        win_height = self.innerHeight;
    }
    if (_dom == 3) {
        win_width = document.body.clientWidth;
        win_height = document.body.clientHeight;
    }
}

function showLayer(layerName){
    if (_dom == 1) document.getElementById(layerName).style.visibility = "visible";
    if (_dom == 2) document.layers[layerName].visibility = "show";
    if (_dom == 3) document.all(layerName).style.visibility = "visible";
}

function hideLayer(layerName){
    if (_dom == 1) document.getElementById(layerName).style.visibility = "hidden";
    if (_dom == 2) document.layers[layerName].visibility = "hide";
    if (_dom == 3) document.all(layerName).style.visibility = "hidden";
}

function moveLayerTo(layerName, x, y){
    if (_dom == 1) {
        document.getElementById(layerName).style.left = x + scrollX;
        document.getElementById(layerName).style.top = y + scrollY;
    }
    if (_dom == 2) {
        document.layers[layerName].left = x + pageXOffset;
        document.layers[layerName].top = y + pageYOffset;
    }
    if (_dom == 3) {
        document.all(layerName).style.pixelLeft = x + document.body.scrollLeft
        document.all(layerName).style.pixelTop = y + document.body.scrollTop;
    }
}

function utiage(layerName,sx,sy,ex,ey,dl,sp) {
    var l, xp, yp, tim, z, dl2;
    l=Math.abs(Math.sqrt(Math.pow((ex-sx),2)+Math.pow((ey-sy),2)));
    z = Math.floor(l / dl); dl2 = l / z;
    if (Math.floor(l) != 0) {
        xp = dl2/l*(ex-sx)+sx;
        if (ex-sx == 0) {
            if (sy<ey) yp = sy+dl2;
            else yp = sy-dl2;
        } else yp = (sy-ey)/(sx-ex)*xp+sy-(sy-ey)/(sx-ex)*sx;
        moveLayerTo(layerName,xp,yp);
        tim = setTimeout("utiage('"+layerName+"',"+xp+","+yp+","+ex+","+ey+","+dl+","+sp+")",sp);
    } else {
        hideLayer(layerName);
        setTimeout("hanabi()",100);
    }
}

function hanabi() {
    for (i=0; i<fireNo*wa; i++) {
        zure1 = Math.floor(i/fireNo)%2 == 0 ? 0:(Math.PI / fireNo);
        zure2 = Math.floor(i/fireNo) * space;
        ran = (radius1>(fireSize*0.8)) ? Math.floor(Math.random()*20-10) : 0;
        radius2 = (radius1 - zure2) > 0 ? radius1 - zure2 : 0;
        if ((radius1 - zure2) > fireSize) { hideLayer("fire" + i); }
        else { showLayer("fire" + i); }
        moveLayerTo("fire" + i, centerX + Math.cos(i * (Math.PI * 2 / fireNo) + zure1) * (radius2) + ran, centerY + Math.sin(i * (Math.PI * 2 / fireNo) + zure1) * (radius2) + ran);
    }
    radius1 += speed;
    if (radius1 > (fireSize + space * wa)) { setHanabiPos(); }
    else { setTimeout("hanabi()",10);}
}

function setHanabiPos() {
    rev = 0; radius1 = 0;
    getWindowSize();
    centerX =  Math.floor(Math.random() * (win_width - (fireSize + space * wa) * 2) + (fireSize + space * wa));
    centerY =  Math.floor(Math.random() * (win_height - (fireSize + space * wa) * 2) + (fireSize + space * wa));
    if (uti) {
        showLayer("fire0");
        utiage("fire0",centerX,(win_height + 50),centerX,centerY,speed,10);
    } else setTimeout("hanabi()",1000);
}

if (_dom) setHanabiPos();

// -->
</SCRIPT>