function checkFileUpload(form,extensions,requireUpload,sizeLimit,minWidth,minHeight,maxWidth,maxHeight,saveWidth,saveHeight) { //v2.09
  document.MM_returnValue = true;
  for (var i = 0; i<form.elements.length; i++) {
    field = form.elements[i];
    if (field.type.toUpperCase() != 'FILE') continue;
    checkOneFileUpload(field,extensions,requireUpload,sizeLimit,minWidth,minHeight,maxWidth,maxHeight,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(field,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,saveH) { //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.saveWidth = saveW; gp_img.saveHeight = saveH; gp_img.onload = showImageDimensions; gp_img.src = imgURL; }
	 } else showImageDimensions(field.gp_img);}
}