it looks like the SpryAssets/SpryValidationTextField.js file on your server has been modified from the original.
I created a form with a spry text field and compared the SpryAssets/SpryValidationTextField.js code on my computer the src="SpryAssets/SpryValidationTextField.js file that is on your server, thew last line on your copy is:
})(); // EndSpryComponent
This is missing from my copy, try deleting that last line from the SpryValidationTextField.js file.