js automatically adjusts image size when loading_image special effects

// Method: setSelectReadOnly is used to set the select control ReadOnly,
// This simulates read-only and is not really read-only
// Uses onbeforeactivate, onfocus, onmouseover, onmouseout events
// Example ： ;
// create by sl
//-------------------------------- ------------------
function ImgAutoSize(imgD,FitWidth,FitHeight)
{
var image1=new Image();
image1 .onload = function ()
{
if(this.width>0 && this.height>0)
{
if(this.width/this.height>= FitWidth/FitHeight)
     {                                                                                                       
else
{
imgD.width=this.width;
imgD.height=this.height;                                                                             (this.height>FitHeight)
                                                                                                                                                                                                                                                                               {
imgD.width=this.width;
imgD.height=this.height;
} }
}
}
image1 = null;
}

image1.src=imgD.src;
imgD.style.cursor = 'hand';
imgD.onclick= function(){openWin(this.src,'imgphoto',600,400)};
imgD.title = "Click to view the original image in a new window";
}