var timer;
var slides = new Array();

//slides    FILENAME  ALT URL
slides[0] = ["images/banner1.jpg", "产科专家", "http://www.hswoman.com/cs/c7/c1/"];
slides[1] = ["images/banner2.jpg", "分娩经历", "http://www.hswoman.com/fenmian/"];
slides[2] = ["images/banner3.jpg", "分娩套餐", "http://www.hswoman.com/ms/c1/c1/"];
slides[3] = ["images/banner5.jpg", "华世孕妈咪风采大赛", "http://www.hswoman.com/chanke/fengcai/"];

function getCurrentSlide() {

  var obj = document.getElementById("hdnSlideIndex");
  return parseInt(obj.value);

}

function saveCurrentSlide(slideIndex) {

  var obj = document.getElementById("hdnSlideIndex");
  obj.value = slideIndex;

}

function NextSlide() {

  ChangeSlide(getCurrentSlide() + 1);

}

function ChangeSlide(newSlideIndex) {

  clearTimeout(timer);

  if (newSlideIndex >= slides.length || newSlideIndex < 0) {
    newSlideIndex = 0;
  }

  jQuery("#mainBody").css("background", "none");
  jQuery("#main-body-bg").fadeOut("slow", function() {
    jQuery("#main-body-bg").css("background", "url(" + slides[newSlideIndex][0] + ") no-repeat top left");
    jQuery("#main-body-bg").fadeIn("slow");
  });

  SetSlideLink(newSlideIndex);

  saveCurrentSlide(newSlideIndex);

  timer = setTimeout("NextSlide()", 7000);

}

function SetSlideLink(slideIndex) {

  if (slideIndex >= slides.length || slideIndex < 0) {
    slideIndex = 0;
  }

  jQuery("#slideOverlay").attr("alt", slides[slideIndex][1]);
  jQuery("#image-map-learnmore").attr("href", slides[slideIndex][2]);

}

jQuery(document).ready(function() {

  jQuery(document).pngFix();
  
  SetSlideLink(0);
  timer = setTimeout("NextSlide()", 7000);

});