在IE6下：img onreadystatechange 第一次无效，以后就都可以

Question

在IE6下：img onreadystatechange 第一次无效，以后就都可以
为何第一次浏览图片传参数过来加载onreadystatechange 这个就没有效果，第二次开始就没问题了。
        function loadImage(obj)
        {
            var img = new Image();
            img = obj;
            
            var appname = navigator.appName.toLowerCase();            
            if (appname.indexOf("netscape") == -1)
            {
               //ie
                //alert('k');  
                    img.onreadystatechange = function () {
                   
                    if (img.readyState == "complete")
                    {
                        alert('k');                
                        setSize(img.width,img.height);
                        img.style.display='none';
                    }
                };
            } else {
               //firefox
                    img.onload = function () {
                    if (img.complete == true)
                    {
                       //alert('k');
                        setSize(img.width,img.height);
                        img.style.display='none';
                    }
                }
            }
        }

Answer 1

楼主可以加载的时候赋值，在onload里加载一个函数，赋值过去就可以了

Answer 2

<input type="file" onchange="onUploadImgChange(this)" /><script type="text/javascript">
        
        function onUploadImgChange(sender){
            if( !sender.value.match( /.jpg|.gif|.png|.bmp/i ) ){
                alert('图片格式无效！');
                return false;
            }
            
            border.style.width=0;
            border.style.height=0;            if( sender.files && sender.files[0] ){                objPreview.style.display='block';
                objPreview.src = sender.files[0].getAsDataURL();
               
                testObject.style.background="url("+sender.files[0].getAsDataURL()+")";
                loadImage(objPreview);
              
            }else if( objPreviewFake.filters ){
                sender.select();
                var imgSrc = document.selection.createRange().text;
                objPreview.style.display='block';
                objPreview.src=imgSrc;
                loadImage(objPreview);
                testObject.style.background ="url("+imgSrc+")";                
            }
        }        function loadImage(obj)
        {
            var img = new Image();
            img = obj;
            
            var appname = navigator.appName.toLowerCase();            
            if (appname.indexOf("netscape") == -1)
            {
               //ie
                //alert('k');  
                    img.onreadystatechange = function () {
                   
                    if (img.readyState == "complete")
                    {
                        //alert('k');                
                        setSize(img.width,img.height);
                        img.style.display='none';
                    }
                };
            } else {
               //firefox
                    img.onload = function () {
                    if (img.complete == true)
                    {
                       //alert('k');
                        setSize(img.width,img.height);
                        img.style.display='none';
                    }
                }
            }
        }
</script>
我这样要怎么改才行？

Answer 3

问题解决，把  objPreview.src=imgSrc;
  loadImage(objPreview);这2个位置换一下loadImage(objPreview);  
objPreview.src=imgSrc;
  
，IE6这个SB，日妈W3C标准就可以不管顺序，IE6解释可能是先去赋值了，下面一个加载还没被触发到，操IE6。