js判断页面是否加载完毕

 用 document.readyState == "complete" 判断页面是否加载完成。

document.onreadystatechange = function(){   
 
        if(document.readyState=="complete")   
 
        {   
 
        alert('加载完毕'); 
 
        } 
 
}

var leftDocument=window.parent.frames("leftFrame").document; if(leftDocument.readyState == 'loaded' || leftDocument.readyState == 'complete') { leftDocument.getElementById("notes").style.display = 'block'; leftDocument.getElementById("others").style.display = 'none'; }

<script language="javascript">

if (document.readyState=="complete")
{
        AdjustImageSize();
}
else
{
        document.onreadystatechange = function()
        {
           
                if (document.readyState == "complete")
                {
                        AdjustImageSize();
                }
        }
}

function AdjustImageSize()
{
        var imageWidth = document.all["SendPic"].width;
        var imageHeight = document.all["SendPic"].height;
        
        if (imageWidth == 0 && imageHeight == 0)
        {
                document.write ("图片下载失败，请刷新！");
                return;
        }
        
        if (imageWidth > 160 || imageHeight > 160)
        {
                if (imageWidth > imageHeight)
                {
                        k = 160 / imageWidth;
                        imageHeight = imageHeight * k;
                        imageWidth = 160;
                }
                else
                {
                        k = 160 / imageHeight;
                        imageWidth = imageWidth * k;
                        imageHeight = 160;
                }
                
                document.all["ImgResized"].value = "1";
        }
        
        document.all["SendPic"].width = imageWidth;
        document.all["SendPic"].height = imageHeight;
        
        document.all["ImgWidth"].value = imageWidth;
        document.all["ImgHeight"].value = imageHeight;
}
</script>