Problem in Uploading,merchant ,logging in/out

[green_beret]

hi
there is a lots of error in the site the first page there is a java Script language Error
this error is in all of the pages
line: 9
char: 15
error: 'Underfined' is null or not an object
code:0
Url:http://www.3dexport.com


each time i Log in i will log out after visting 2 or 3 pages of the website


in this page http://www.3dexport.com/member.php?action=uploadform
a Client Side Script needed for example if some one forget to write the Name of model he should upload it again and it takes time its good to put a Script in that page to forbid sending not compelet request it just make the server Slow and always Busy.
and some times this page wont work or after uploading redircet users to irrelivent pages


in this page https://merchant.webmoney.ru/lmi/payment.asp
there is another error err: 3 merchant purse (Z106912321525) not found

it seems the Merchant isnt found on their database