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WEB开发中的提示

程序员文章站 2024-03-05 15:39:37
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1.当后台处理时间较长时,可在提交前显示一个层提示 :

<script type='text/javascript' src='DivLayer.js'></script>
  <script type='text/javascript' >
   function submitXform() {
    var params = {width:300,height:60};
    var layer = new Layer(params);
    layer.showStringLayer("正在检查并提交,请稍等...");
    inputForm.submit();
   }
  </script>

 

2.当加载页面需要较长时间时,可使用如下方式提示:

<body>
   <script type='text/javascript' src='DivLayer.js'></script>
   <script type='text/javascript' >
    var params = {width:300,height:60};
    var layer = new Layer(params);
    layer.showStringLayer("正在加载页面,请稍等...");
   </script>
  </body>
   
   <script type='text/javascript' >
    setInterval("doInit()",100);
    function doInit() {
     var currentState = document.readyState.toLowerCase();
     if (currentState == 'complete') // 文档加载完成
     {
      // 隐藏提示层
      layer.hideLayer();
     }
    }
   </script>

 

DivLayer.js:

//居中显示的层

var Layer = function(params){
 this.params = params;
 this.createLayer = function() {
  var s = "<div id='center_layer' style='position:absolute;top:50%;left:50%;text-align:center;width:" + this.params.width +";height:"+this.params.height+";margin-top:-"+this.params.height/2+";margin-left:-"+this.params.width/2+";padding-top:"+(this.params.height/4+5)+";z-index:10;display:none;border:1px solid #0099FF;'></div>";
  var fullscreen = "<div style='width:100%;height:100%;z-index=9'></div>";
  document.write(fullscreen);
  document.write(s);
 },
 this.showStringLayer = function(displayString) {
  this.createLayer();
  center_layer.innerText = displayString;
  center_layer.style.display = "block";
 },
 this.showImageLayer = function(img) {
  this.createLayer();
  center_layer.innerHTML = img;
  center_layer.style.display = 'block';
 },
 this.hideLayer = function() {
  center_layer.style.display = 'none';
 }
}

 

相关标签: web 提示