netscape & onsubmit.

<form method="post" action="<%=MM_editAction%>" name="form1" enctype="multipart/form-data"  onSubmit="checkFileUpload(this,'GIF,JPG,JPEG,BMP,PNG',true,' ',150,100,640,480,'PIC_WIDTH','PIC_HEIGHT');return  document.MM_returnValue">

<script language="JavaScript">

<!--

function MM_findObj(n, d) { //v4.0

  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {

    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}

  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[n];

  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers.document);

  if(!x && document.getElementById) x=document.getElementById(n); return x;

}



function MM_validateForm() { //v4.0

  var  i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arg uments;

  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args);

    if (val) { nm=val.name; if ((val=val.value)!="") {

      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');

        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';

      } else if (test!='R') {

        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';

        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');

            min=test.substring(8,p); max=test.substring(p+1);

            if (val<min || max<val) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';

    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }

  } if (errors) alert('The following error(s) occurred:\n'+errors);

  document.MM_returnValue = (errors == '');

}



function  checkFileUpload(form,extensions,requireUpload,sizeLimit,minW idth,minHeight,maxWidth,maxHeight,saveWidth,saveHeight)  { //v2.09

  document.MM_returnValue = true;

  for (var i = 0; i<form.elements.length; i++) {

    field = form.elements;

    if (field.type.toUpperCase() != 'FILE') continue;

     checkOneFileUpload(field,extensions, requireUpload,sizeLimit,minWidth,minHeight,maxWidth,maxHeigh t,saveWidth,saveHeight);

} }



function  checkOneFileUpload(field,extensions,requireUpload,sizeLimit, minWidth,minHeight,maxWidth,maxHeight,saveWidth,saveHeight)  { //v2.09

  document.MM_returnValue = true;

  if (extensions != '') var re = new RegExp("\.(" + extensions.replace(/,/gi,"|").replace(/\s/gi,"") + ")$","i");

    if (field.value == '') {

      if (requireUpload) {alert('File is required!');document.MM_returnValue = false;field.focus();return;}

    } else {

      if(extensions != '' && !re.test(field.value)) {

        alert('This file type is not allowed for uploading.\nOnly the following file extensions are allowed: ' + extensions + '.\nPlease select another file and try again.');

        document.MM_returnValue = false;field.focus();return;

      }

    document.PU_uploadForm = field.form;

    re = new RegExp(".(gif|jpg|png|bmp|jpeg)$","i");

    if(re.test(field.value) && (sizeLimit != '' || minWidth != '' || minHeight != '' || maxWidth != '' || maxHeight != '' || saveWidth != '' || saveHeight != '')) {

       checkImageDimensions(fie ld,sizeLimit,minWidth,minHeight,maxWidth,maxHeight,saveWidth ,saveHeight);

    } }

}



function showImageDimensions(fieldImg) { //v2.09

  var isNS6 = (!document.all && document.getElementById ? true : false);

  var img = (fieldImg && !isNS6 ? fieldImg : this);

  if (img.width > 0 && img.height > 0) {

  if ((img.minWidth != '' && img.minWidth > img.width) || (img.minHeight != '' && img.minHeight > img.height)) {

    alert('Uploaded Image is too small!\nShould be at least ' + img.minWidth + ' x ' + img.minHeight); return;}

  if ((img.maxWidth != '' && img.width > img.maxWidth) || (img.maxHeight != '' && img.height > img.maxHeight)) {

    alert('Uploaded Image is too big!\nShould be max ' + img.maxWidth + ' x ' + img.maxHeight); return;}

  if (img.sizeLimit != '' && img.fileSize > img.sizeLimit) {

    alert('Uploaded Image File Size is too big!\nShould be max ' + (img.sizeLimit/1024) + ' KBytes'); return;}

  if (img.saveWidth != '') document.PU_uploadForm[img.saveWidth].value = img.width;

  if (img.saveHeight != '') document.PU_uploadForm[img.saveHeight].value = img.height;

  document.MM_returnValue = true;

} }



function  checkImageDimensions(field,sizeL,minW,minH,maxW,maxH,saveW,s aveH) { //v2.09

  if (!document.layers) {

    var isNS6 = (!document.all && document.getElementById ? true : false);

    document.MM_returnValue = false; var imgURL = 'file:///' +  field.value.replace(/\\/gi,'/').replace(/:/gi,'|').replace(/ "/gi,'').replace(/^\//,'');

    if (!field.gp_img || (field.gp_img && field.gp_img.src != imgURL) || isNS6) {field.gp_img = new Image();

               with (field) {gp_img.sizeLimit = sizeL*1024; gp_img.minWidth = minW; gp_img.minHeight = minH; gp_img.maxWidth = maxW; gp_img.maxHeight = maxH;

           gp_img.saveW idth = saveW; gp_img.saveHeight = saveH; gp_img.onload = showImageDimensions; gp_img.src = imgURL; }

      } else showImageDimensions(field.gp_img);}

}

//-->

</script>