对象化JS之 －－文件上传客户端控制脚本

<SCRIPT LANGUAGE=javascript>
onload=function(){
 var lofile = new upfile();
}

function upfile(aoP){
　  var loThis = document.createElement(SPAN);
 var lsuniqueID = loThis.uniqueID;
　  loThis.innerHTML = <select style=width:200></select><button onclick=+lsuniqueID+.Del()>删除</button><span><span><input style=width:10 type=file onpropertychange=+lsuniqueID+.Add(this)></span></span>;
　  if (aoP==null){
　　　  document.body.appendChild(loThis);
　  }else{
　　　  aoP.appendChild(loThis);
　  }
　  var loSelect = loThis.children[0];
　  var loFiles  = loThis.children[2];
 loThis.Add = function(aoFile){
　if ((aoFile==null)||(aoFile.value==)) return;
　var loOpts = loSelect.options;
　var lsfilename = aoFile.value.substring(aoFile.value.lastIndexOf(\\)+1);
　loOpts[loOpts.length] = new Option(lsfilename,aoFile.uniqueID);
　loSelect.value = aoFile.uniqueID;
　aoFile.parentElement.style.display = none;
　var loObj = document.createElement(span);
　loObj.innerHTML = <input style=width:10 type=file onpropertychange=+lsuniqueID+.Add(this)>;
　loFiles.insertBefore(loObj);
 }
 loThis.Del = function(){
　loEL = document.all(loSelect.value);
　if (loEL!=null){
　 loEL = loEL.parentElement;
　 loFiles.removeChild(loEL);
　}
　var loOpts = loSelect.options;
　if(loOpts!=null&&loOpts.length>0){
　 loSel = loOpts[loSelect.selectedIndex]
　 loOpts.removeChild(loSel);
　}
 }
 loThis.AddName = function(asName){
　if ((asName==null)||(asName==)) return;
　var loOpts = loSelect.options;
　loOpts[loOpts.length] = new Option(asName,null);
 }
 loThis.getNames = function(){
　var loOpts = loSelect.options;
　var lxNames = new Array;
　for (var i=0; i<loOpts.length; i++){
　 lxNames[lxNames.length] = loOpts[i].innerText;
　}
　return lxNames;
 }
 return loThis;
}
</SCRIPT>