Kod kesan pop timbul gambar ruang QQ dilaksanakan oleh kemahiran JS_javascript

Contoh dalam artikel ini menerangkan kod kesan timbul gambar ruang QQ yang dilaksanakan oleh JS. Kongsikan dengan semua orang untuk rujukan anda, butirannya adalah seperti berikut:

<script type="text/javascript">
function imageShow(which_click) {
  var image_path = which_click;
  //alert(image_path);
  var tag_top = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
  //创建底层灰色DIV
  var index_tag = document.createElement("div");
  index_tag.style.cssText = "width:100%;height:"+Math.max(document.body.clientHeight,document.body.offsetHeight,document.documentElement.clientHeight)+"px;position:relative;background:black;top:0;filter: Alpha(Opacity=80);Opacity:0.8;";
  document.body.appendChild(index_tag);
  //index_tag.ondblclick = closeIndexTag;
  index_tag.onclick = closeIndexTag;
  //创建图片DIV
  var img_tag = document.createElement("div");
  img_tag.style.cssText = "font:12px/18px verdana;overflow:auto;text-align:center;position:absolute;width:200px;border:5px solid white;background:white;color:white;left:"+(parseInt(document.body.offsetWidth)/2-100)+"px;top:"+(document.documentElement.clientHeight/3+tag_top)+"px;";
  img_tag.innerHTML = "<div style='padding:10px;background:#cccccc;border:1px solid white'><img src='images/loading.gif' /><br /><br /><b style='color:#999999;font-weight:normal'>Image loading...</b><br /></div>";
  img_tag.oncontextmenu = function() {
    var clsOK=confirm("是否确定关闭图片显示");
    if(clsOK)
      closeIndexTag();
    return false;
  }
  img_tag.onclick = closeIndexTag;
  //img_tag.onmousemove = barDidplay;
  document.body.appendChild(img_tag);
  //构建图片关闭按钮
  var close_tag = document.createElement("div");
  close_tag.style.cssText = "display:none;position:absolute;left:10px;top:10px;color:black;";
  close_tag.innerHTML = "<b style='background:none;border:0px solid white;filter:Alpha(Opacity=50);Opacity:0.5;cursor:pointer;'> 关闭 </b>";
  close_tag.onclick = closeIndexTag;
  var img = new Image();
  img.src = image_path;
  img.style.cssText = "border:1px solid #cccccc;filter: Alpha(Opacity=0);Opacity:0;cursor:pointer";
  img.onload = imgOK();
  function imgOK() {
    var temp = 0;
    var stop_x = false;
    var stop_y = false;
    var img_tag_x = img_tag.offsetWidth;
    var img_tag_y = img_tag.offsetHeight;
    var img_x = img.width;
    var img_y = img.height;
    var scroll_x=document.documentElement.clientWidth;
    var scroll_y=window.innerHeight||document.documentElement.clientHeight;
    var yy = 0;
    var xx = 0;
    if(img_y > scroll_y || img_x > scroll_x){
      yy = scroll_y - 100;
      xx = (img_x / img_y) * yy;
    }else{
      xx = img_x + 4;
      yy = img_y + 3;
    }
    img.style.width=xx-4+'px';
    img.style.height=yy-3+'px';
    var maxTime = setInterval(function() {
      temp += 30;
      if((img_tag_x + temp) < xx) {
        img_tag.style.width = (img_tag_x + temp) + "px";
        img_tag.style.left = (scroll_x - img_tag_x - temp)/2 + "px";
      } else {
        stop_x = true;
        img_tag.style.width = xx + "px";
        img_tag.style.left = (scroll_x - xx)/2 + "px";
      }
      if((img_tag_y + temp) < yy) {
        img_tag.style.height = (img_tag_y + temp) + "px";
        img_tag.style.top = (tag_top + (scroll_y - img_tag_y - temp)/2) + "px";
      } else {
        stop_y = true;
        img_tag.style.height = yy + "px";
        img_tag.style.top = (tag_top + (scroll_y - yy)/2) + "px";
      }
      if(stop_x && stop_y) {
        clearInterval(maxTime);
        img_tag.appendChild(img);
        temp = 0;
        imgOpacity(temp);
      }
    }, 1);
    img_tag.innerHTML="";
    img_tag.appendChild(close_tag);
  }
  function closeIndexTag() {
    document.body.removeChild(index_tag);
    document.body.removeChild(img_tag);
  }
  function imgOpacity(temp_imgOpacity) {
    var temp = temp_imgOpacity;
    temp += 10;
    img.style.filter = "alpha(opacity=" + temp + ")";
    img.style.opacity = temp/100;
    var imgTime = setTimeout(function() {imgOpacity(temp);}, 10);
    if(temp > 100)
      clearTimeout(imgTime);
  }
  var bar_show;
  function barDidplay(){
    clearTimeout(bar_show);
    close_tag.style.display = "block";
    bar_show = setTimeout(function() {close_tag.style.display = "none"}, 1000);
  }
}
</script>

bahagian html:

<a class="add" href="javascript:;" onclick="imageShow('img/hn_bg.jpg')">
<span>图片效果</span>
</a>

Pembaca yang berminat dengan lebih banyak kandungan berkaitan JavaScript boleh menyemak topik khas di tapak ini: "Ringkasan teknik algoritma carian JavaScript", "Ringkasan kesan dan teknik khas animasi JavaScript ", "Ringkasan ralat JavaScript dan teknik penyahpepijatan", "Ringkasan struktur data JavaScript dan teknik algoritma", "Ringkasan algoritma dan teknik traversal JavaScript" dan "Ringkasan Matematik JavaScript bagi penggunaan operasi》

Saya harap artikel ini akan membantu semua orang dalam pengaturcaraan JavaScript.