var fileExtension = fileName.substring(fileName.lastIndexOf('.') + 1);
if (fileName == "")
{
var length = FSObject.$("[id$=lblUploadW9FileName]").length;
if (FSObject.$("[id$=lblUploadW9FileName]")[length - 1].innerHTML == "")
{
e.IsValid = false;
}
else
{
if (fileExtension != ".doc" || ".DOC " || ".txt" || ".docx" || ".DOCX" || ".TXT" || ".xls" || ".xlsx" || ".XLS" || ".XLSX" || ".pdf" || ".PDF")
{
FSObject.$("[id$=cusUploadW9]")[0].innerHTML = "Invalid extension, only .doc, .docx, .txt, .xls, .xlsx, .pdf and .jpg extensions are supported";
e.IsValid = false;
}
else
{
e.IsValid = true;
}
}
}
else {
if (fileExtension != ".doc" || ".DOC " || ".txt" || ".docx" || ".DOCX" || ".TXT" || ".xls" || ".xlsx" || ".XLS" || ".XLSX" || ".pdf" || ".PDF")
{
FSObject.$("[id$=cusUploadW9]")[0].innerHTML = "Invalid extension, only .doc, .docx, .txt, .xls, .xlsx, .pdf and .jpg extensions are supported";
e.IsValid = false;
}
else
{
e.IsValid = true;
}
}
}