이미지가 자동으로 바뀌는 자바스크립트인데요

현재 이미지(image1.jpg) width가 이미지사이즈 크기의 px로 되어있는데

width(image1.jpg)를 100%로 하고싶으면 어디소스를 수정해야하나요?

html부분

<div id="slideShowImages2">
    <img src="image1.jpg" alt="Slide 1">

</div>

js부분

window.addEventListener('load', slideShow, false);

function slideShow() {
 
  /* GLOBALS **********************************************************************************************/
 
  var globals = {
    slideDelay: 7000, // The time interval between consecutive slides.
    fadeDelay: 35, // The time interval between individual opacity changes. This should always be much smaller than slideDelay. 
    wrapperID: "slideShowImages", // The ID of the <div> element that contains all of the <img> elements to be shown as a slide show.
    buttonID: "slideShowButton", // The ID of the <button> element that toggles the slide show on and off.
    buttonStartText: "Start Slides", // Text used in the slide show toggle button.
    buttonStopText: "Stop Slides", // Text used in the slide show toggle button.   
    wrapperObject: null, // Will contain a reference to the <div> element that contains all of the <img> elements to be shown as a slide show.
    buttonObject: null, // If present, will contain a reference to the <button> element that toggles the slide show on and off. The initial assumption is that there is no such button element (hence the false value).
    slideImages: [], // Will contain all of the slide image objects.
    slideShowID: null, // A setInterval() ID value used to stop the slide show.
    slideShowRunning: true, // Used to record when the slide show is running and when it's not. The slide show is always initially running.   
    slideIndex: 0 // The index of the current slide image.
  }
 
  /* MAIN *************************************************************************************************/
 
  initializeGlobals(); 
 
  if ( insufficientSlideShowMarkup() ) {
    return; // Insufficient slide show markup - exit now.
  }
 
   // Assert: there's at least one slide image.
 
  if (globals.slideImages.length == 1) {
    return; // The solo slide image is already being displayed - exit now.
  }
 
  // Assert: there's at least two slide images.
 
  initializeSlideShowMarkup();
 
  globals.wrapperObject.addEventListener('click', toggleSlideShow, false); // If the user clicks a slide show image, it toggles the slide show on and off.
 
  if (globals.buttonObject) {
    globals.buttonObject.addEventListener('click', toggleSlideShow, false); // This callback is used to toggle the slide show on and off.
  }
 
  startSlideShow();
 
  /* FUNCTIONS ********************************************************************************************/
 
  function initializeGlobals() {  
    globals.wrapperObject = (document.getElementById(globals.wrapperID) ? document.getElementById(globals.wrapperID) : null);
    globals.buttonObject = (document.getElementById(globals.buttonID) ? document.getElementById(globals.buttonID) : null);  
   
    if (globals.wrapperObject) {
      globals.slideImages = (globals.wrapperObject.querySelectorAll('img') ? globals.wrapperObject.querySelectorAll('img') : []);
    }
  } // initializeGlobals
 
  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  function insufficientSlideShowMarkup() {
    if (!globals.wrapperObject) { // There is no wrapper element whose ID is globals.wrapperID - fatal error.
      if (globals.buttonObject) {
        globals.buttonObject.style.display = "none"; // Hide the not needed slide show button element when present.
      }
      return true;
    }

    if (!globals.slideImages.length) { // There needs to be at least one slide <img> element - fatal error.
      if (globals.wrapperObject) {
        globals.wrapperObject.style.display = "none"; // Hide the not needed <div> wrapper element.
      }
   
      if (globals.buttonObject) {
        globals.buttonObject.style.display = "none"; // Hide the not needed slide show button element.
      }
   
      return true;
    }
   
    return false; // The markup expected by this library seems to be present.
  } // insufficientSlideShowMarkup
 
  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  function initializeSlideShowMarkup() { 
    var slideWidthMax = maxSlideWidth(); // Returns a value that is always in pixel units.
    var slideHeightMax = maxSlideHeight(); // Returns a value that is always in pixel units.
   
    globals.wrapperObject.style.position = "relative";
    globals.wrapperObject.style.overflow = "hidden"; // This is just a safety thing.
    globals.wrapperObject.style.width = slideWidthMax + "px";
    globals.wrapperObject.style.height = slideHeightMax + "px";
   
    var slideCount = globals.slideImages.length;
    for (var i = 0; i < slideCount; i++) {
      globals.slideImages[i].style.opacity = 0;
      globals.slideImages[i].style.position = "absolute";
      globals.slideImages[i].style.top = (slideHeightMax - globals.slideImages[i].getBoundingClientRect().height) / 2 + "px";  
      globals.slideImages[i].style.left = (slideWidthMax - globals.slideImages[i].getBoundingClientRect().width) / 2 + "px";              
    }
   
    globals.slideImages[0].style.opacity = 1; // Make the first slide visible.
       
    if (globals.buttonObject) {
      globals.buttonObject.textContent = globals.buttonStopText;
    }
  } // initializeSlideShowMarkup
 
  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   
  function maxSlideWidth() {
    var maxWidth = 0;
    var maxSlideIndex = 0;
    var slideCount = globals.slideImages.length;
   
    for (var i = 0; i < slideCount; i++) {
      if (globals.slideImages[i].width > maxWidth) {
        maxWidth = globals.slideImages[i].width; // The width of the widest slide so far.
        maxSlideIndex = i; // The slide with the widest width so far.
      }
    }

    return globals.slideImages[maxSlideIndex].getBoundingClientRect().width; // Account for the image's border, padding, and margin values. Note that getBoundingClientRect() is always in units of pixels.
  } // maxSlideWidth
 
  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   
  function maxSlideHeight() {
    var maxHeight = 0;
    var maxSlideIndex = 0;   
    var slideCount = globals.slideImages.length;
   
    for (var i = 0; i < slideCount; i++) {
      if (globals.slideImages[i].height > maxHeight) {
        maxHeight = globals.slideImages[i].height; // The height of the tallest slide so far.
        maxSlideIndex = i; // The slide with the tallest height so far.
      }
    }
   
    return globals.slideImages[maxSlideIndex].getBoundingClientRect().height; // Account for the image's border, padding, and margin values. Note that getBoundingClientRect() is always in units of pixels.
  } // maxSlideHeight

  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  function startSlideShow() {
    globals.slideShowID = setInterval(transitionSlides, globals.slideDelay);               
  } // startSlideShow

  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
  function haltSlideShow() {
    clearInterval(globals.slideShowID);  
  } // haltSlideShow

  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
  function toggleSlideShow() {
    if (globals.slideShowRunning) {
      haltSlideShow();
      if (globals.buttonObject) {
        globals.buttonObject.textContent = globals.buttonStartText;
      }
    }
    else {
      startSlideShow();
      if (globals.buttonObject) {
        globals.buttonObject.textContent = globals.buttonStopText;
      }           
    }
    globals.slideShowRunning = !(globals.slideShowRunning);
  } // toggleSlideShow
 
  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  function transitionSlides() {
    var currentSlide = globals.slideImages[globals.slideIndex];
   
    ++(globals.slideIndex);
    if (globals.slideIndex >= globals.slideImages.length) {
      globals.slideIndex = 0;
    }
   
    var nextSlide = globals.slideImages[globals.slideIndex];
   
    var currentSlideOpacity = 1; // Fade the current slide out.
    var nextSlideOpacity = 0; // Fade the next slide in.
    var opacityLevelIncrement = 1 / globals.fadeDelay;
    var fadeActiveSlidesID = setInterval(fadeActiveSlides, globals.fadeDelay);
   
    function fadeActiveSlides() {
      currentSlideOpacity -= opacityLevelIncrement;
      nextSlideOpacity += opacityLevelIncrement;
     
      // console.log(currentSlideOpacity + nextSlideOpacity); // This should always be very close to 1.
     
      if (currentSlideOpacity >= 0 && nextSlideOpacity <= 1) {
        currentSlide.style.opacity = currentSlideOpacity;
        nextSlide.style.opacity = nextSlideOpacity;
      }
      else {
        currentSlide.style.opacity = 0;
        nextSlide.style.opacity = 1;
        clearInterval(fadeActiveSlidesID);
      }       
    } // fadeActiveSlides
  } // transitionSlides
 
} // slideShow