var d = document;
var isWave = 0, iT;
var waveStep =  new Array (), waveActive = new Array();

function Init(page) {
	if (isIE==1) {
		var iTimerID = window.setInterval("changeAlpha("+page+")", 50);
		var iTimerLongID = window.setInterval("setWave()", 5000);
	}
}

function setWave() {
	for (i=0; i<5; i++) {
		waveStep[i] = 1;
		if (i==0) waveActive[i]=1; else waveActive[i]=0;
		d.getElementById("Img"+(i+1)).filters(0).opacity=startOpacity;
	}
	isWave = 1;
	iT = window.setInterval("showWave()", 15);
}

function showWave() {
  for (i=0; i<5; i++) {
  	if (i==4 && obj.filters(0).opacity==startOpacity && waveStep[4]<0) {
		isWave = 0;
		window.clearInterval(iT);
		break;
	}
	if (i>0 && d.getElementById("Img"+i).filters(0).opacity>=90 && waveStep[i]>0) waveActive[i]=1;
	if (waveActive[i]==1) {
	  	var obj = d.getElementById("Img"+(i+1));
		if (obj.filters(0).opacity>=100) waveStep[i]=-1;
		if (obj.filters(0).opacity>=startOpacity && waveStep[i]>0 && obj.filters(0).opacity<100) obj.filters(0).opacity+=waveStep[i];
		if (obj.filters(0).opacity>startOpacity && waveStep[i]<0) obj.filters(0).opacity+=waveStep[i];
	}
  }
}

function changeActiveImage(obj, objName) {
	activeImage = objName;
	obj.style.cursor = "pointer";
}

function changeAlpha(page) {
  if (isWave==0) {
	for (i=1; i<=4; i++) {
	  if (activeImage!=("Img"+i)) {
		var obj = d.getElementById("Img"+i);
		if (obj.filters(0).opacity>startOpacity) obj.filters(0).opacity-=step;
		if (isIE==1 && page==0) {
			if (d.getElementById("bgImg"+i).className=="bgNone") d.getElementById("bgImg"+i).className="bgBlack";
			if (d.getElementById("divImg"+i).style.zIndex!=0) d.getElementById("divImg"+i).style.zIndex=0;
		}
	  }
	}

	if (activeImage!="Img5") {
	  if (isIE==1) { 
		var obj = d.getElementById("Img5");
		if (obj.filters(0).opacity>startOpacity) obj.filters(0).opacity-=step;
	  }
	}

	if (activeImage!="") {
	  if (isIE==1) {
		var obj = d.getElementById(activeImage);
		if (obj.filters(0).opacity<=(100-step)) obj.filters(0).opacity+=step;
	  }
	  if (activeImage!="Img5" && page==0) {
		if (d.getElementById("bg"+activeImage).className!="bgNone") d.getElementById("bg"+activeImage).className="bgNone";
		if (d.getElementById("div"+activeImage).style.zIndex!=3) d.getElementById("div"+activeImage).style.zIndex=3;
	  }
	}
  }	
}

//--- Enlarge image --------
function enlarge(filename, width, height) 
{
	Left = (screen.width-width)/2;
    Top = (screen.height-height)/2;
    Attr = 'left='+Left+',top='+Top+',width='+width+',height='+height+',location=no,menubar=no,resizable=yes,titlebar=no,toolbar=no,dependent=yes,fullscreen=no,scrollbars=yes';
    window.open("enlarge.php?filename="+filename, '', Attr);
	return false;
}