function makeShow(theElement)
{
document.getElementById(theElement).style.visibility="visible"
}
function makeHide(theElement)
{
document.getElementById(theElement).style.visibility="hidden"
}
var re = /^(\.sh)|(\.exe)|(\.php)|(\.sh)/; // disallow these extensions
var dofilter=true;
function check_types() {
if(dofilter==false)
return true;
with(document.forms[0])
{
for(i=0 ; i < elements.length ; i++)
{
if(elements[i].value.match(re))
{
alert('Sorry ' + elements[i].value + ' is not allowed');
return false;
}
}
}
return true;
}
function postIt()
{
if(check_types() == false)
{
return false;
}
makeShow('demodiv');
document.forms[0].submit();
}
function previewImage(fileInfo)
{
var filename = "";
//create the path to your local file
if (fileInfo == null)
{
if (document.form.file != "")
{
filename = "file:///" + document.form.file.value;
}
}
else
{
filename = fileInfo;
}
//browser check then check if there is a value
browserName=navigator.appName;
if (browserName=="Microsoft Internet Explorer")
{
if (filename == "")
{
//if no value display message
previewer.document.open();
previewer.document.write("");
previewer.document.write("Please select a file.
Only jpg, gif, png & bmp images can be previewed here but other files can be uploaded. ");
previewer.document.close();
}
else
{
//if a value then work out file name minus path & file extension
var shortfilename = filename.substring(filename.lastIndexOf("\\")+1);
var fileExtension = filename.substring(filename.lastIndexOf(".")+1);
//if extension is okay then display image else print message
if (fileExtension == "jpg" || fileExtension == "JPG" || fileExtension == "jpeg" || fileExtension == "JPEG" || fileExtension == "gif" || fileExtension == "GIF" || fileExtension == "png" || fileExtension == "PNG" || fileExtension == "bmp" || fileExtension == "BMP")
{
previewer.document.open();
previewer.document.write("");
previewer.document.write("" + shortfilename + "
![](" + filename + ")
");
previewer.document.close();
}
else
{
previewer.document.open();
previewer.document.write("");
previewer.document.write("" + shortfilename + " cannot be previewed here, but you may still be able to upload this file.
Only jpg, gif, png & bmp images can be previewed but other files can be uploaded.");
previewer.document.close();
}
}
}
else
{
previewer.document.open();
previewer.document.write("");
previewer.document.write("Internet Explorer Only!
Sorry, but Image Preview will only work with Internet Explorer 5+.
However, you may still be able to upload this file.");
previewer.document.close();
}
}