JS detection upload picture type and width (scaled)

JS detection upload picture type and width (scaled)

<form action= "" method= "Post" enctype= "Multipart/form-data" name= "Dform" >
<label for= "IFile" ></label>
<input type= "File" Name= "IFile" id= "IFile" >
<input type= "Submit" name= "button" id= "button" value= "Submit" onclick= "Web Effects: toi_upimg ();" >
</form>
<script>
function toi_upimg ()
{
var form = Document.dform;
var isrc = Form.ifile.value;
var pos = Isrc.lastindexof ('. ');
var img = new Image ();

 //On load
  img.onload = function () {
    var width = img.width;
     var height = img.height;
    img.onload = ';
    if (Width > | | height >)
    {
      => 480*360
      var ratio1 = 320/width;
      var Ratio2 = 240/height;
      if (Ratio1 > Ratio2)
      {
         width = parseint (Ratio2 * width);
        height = 240;
     }
      Else
      {
         width = 320;
        height = parseint (ratio1 * height);
     }     
      alert (' Note: The picture is too large, the system has made some adjustments automatically ');
 
   
    toi_img.src = img.src;
    toi_img.width = width;
    toi_img.height = height;
  Form.picwidth.value = width;
  Form.picheight.value = height;
  Form.mserver.value = "no";
    form.xpost.value = ' 0 ';
    form.ypost.value = ' 0 ';
    form.xposy.value = ' 0 ';
    form.yposy.value = ' 0 ';
    form.xposa.value = ' 0 ';
    form.yposa.value = ' 0 ';
 if (Form.title.value = = ")
    {
      var pos2 = Isrc.lastindexof (");
      form.title.value = isrc.substring (Pos2+1,pos);
   }
    toi_update ();
    delete img;
 };

On Error
Img.onerror = function () {
Img.onerror = ';
Alert (' Note: A file you just tried to upload does not appear to be a legitimate picture ');
Delete img;
};

Store the source address
if (Navigator.appversion.indexof (' Msie 7 ') >= 0)
{
document.getElementById ("Filterimage"). Filters.item ("Dximagetransform.microsoft.alphaimageloader"). src = isrc;
IMG.SRC = document.getElementById ("Filterimage"). Filters.item ("Dximagetransform.microsoft.alphaimageloader"). src ;
}
Else
{
IMG.SRC = ISRC;
}
}
</script>