var slideShowSpeed = 8000;
var crossFadeDuration = 6;
var t;
var j = 2;
var images = new Array();

function runSlideShow(){
    setOpacity('simg',50);
    document.images.SlideShow.src = "/images/swhc_" + j + ".jpg";
    fade("simg",20,100,2000);
    j++;
    if (j > 5 ) j = 1 ;
    t = setTimeout('runSlideShow()', slideShowSpeed);
}

window.onload = function() { 
    if(document.getElementById){
	for(var i=1; i<6; i++) {
	    images[i] = new Image(550,367);
	    images[i].src = "images/swhc_" + i + ".jpg";
	}
        t = setTimeout('runSlideShow()', slideShowSpeed);
    }
}

function setOpacity(eID, opacityLevel) {
    var eStyle = document.getElementById(eID).style;
    eStyle.opacity = opacityLevel / 100;
    eStyle.filter = 'alpha(opacity='+opacityLevel+')';
}


function fade(eID, startOpacity, stopOpacity, duration) {
     var speed = Math.round(duration / 100);
     var timer = 0;
     if (startOpacity < stopOpacity){ // fade in
          for (var i=startOpacity; i<=stopOpacity; i++) {
              setTimeout("setOpacity('"+eID+"',"+i+")", timer * speed);
              timer++;
          } return;
      }
      for (var i=startOpacity; i>=stopOpacity; i--) { // fade out
          setTimeout("setOpacity('"+eID+"',"+i+")", timer * speed);
          timer++;
      }
 }


function getElm(eID) {
    return document.getElementById(eID);
}

function show(eID) {
    getElm(eID).style.display='block';
}

function hide(eID) {
    getElm(eID).style.display='none';
}