Help with javascript code

I need help with this code there is parsing error but not sure where it happened. This extension idea is simple when you hoever over picture while holding crtl Key it goeds bigger. when you press agean then it goes back. Please help.

window.onload = function () {
  // valid koik pildid
  // foreach pildidi ja igale pildile lisa eventlistener
  /* var srcList = $('img').map(function () {
    return this.src
  }).get() */
  // var ctrlKey = String.fromCharCode(keyPress)
  // const ctrlKey = String.fromCharCode(event.buttonPress)
  var images = document.getElementsByTagName('img')
  // console.log(images)
  // var srcList = []
  // for (var i = 0; i < images.length; i++) {
  //  srcList.push(images[i].src)
  // }
  for (var i = 0; i < images.length; i++) {
    var img = images[i]
    img.addEventListener('mouseover', function (event) {
      // console.log(event)
      if (!event.ctrlKey) { return }
      // const letter = String.fromCharCode(event.which)
      var el = event.target
      el.style.width = el.offsetWidth * 1.5 + 'px'
      el.style.height = el.offsetHeight * 1.5 + 'px'

      el.style.position = 'fixed'
      el.style.transition = '2s'
      // el.style.left = event.x + el.offsetWidth * 0.5 + 'px' // hiire koordinaadid
      // el.style.top = event.y + el.offsetHeight * 0.5 + 'px'
      el.style.left = window.innerWidth / 2 - 0.5 * el.style.width.replace('px', '') + 'px'
      el.style.top = 0
      console.log(event)
    }, true)

    //document.addEventListener('keyDown', function (event) {
    this.document.addEventListener("keyDown", checkKeyPress, false)
    function checkKeyPress(key){
        if(key.keyCode == "17"){
      //const CrtlKey = String.fromCharCode(17)
      // const ctrlKey = String.fromCharCode(event.keyDown)
      // if (!event.ctrlKey) { return }
      // alert('CrtlKey')

      // console.log(event)
        var el = event.target
        if (event.ctrlKey) {
        //alert("ctr key was pressed during the click");

        el.style.width = el.offsetWidth / 3 * 2 + 'px'
        el.style.height = el.offsetHeight / 3 * 2 + 'px'
        el.style.position = 'relative'
        el.style.left = 0
        el.style.top = 0
        }
      }, true)
    }
  }
}
// Image.addEventListener(onmouseover, src('img')[, large]);

// var img = document.getElementById('image-hover')