Why does Oran Student Management Information System display the verification code incorrectly?

Problem description: Captcha is always wrong, and the solution to the captcha error: the first one: use full-width characters to enter the captcha, and almost all the input characters of the webpage are half-width characters, that is, English characters. When entering the verification code, the web page with full-width characters cannot be recognized. When you encounter the problem that the verification code is always wrong, please carefully check the character mode used by the input method; Solution: Adjust the input method to the half-angle input state. Usually click the right mouse button in the status bar of the input method to see the options of switching between full-width and half-width, and the difference between full-width and half-width, such as full-width character abcd and half-width character ABCD; The second type: beyond the effective time of verification code input, most verification code pages have set the effective time of verification code, which is generally 45 seconds. When the user stays on the page without verification code operation for more than 45 seconds, the current verification code will be invalid, and the page needs to be refreshed to enter it correctly; Solution: Try to ensure that the verification code is entered within the effective time, generally about 45 seconds. If it exceeds the valid time, please press F5 to refresh and re-enter; The third type: IE browser cookies are blocked. When the "privacy" of IE browser is set to the highest, all cookie files from web pages will be blocked, which makes it impossible to exchange necessary data with the web server. Solution: Open IE browser and click the "Tools" menu above->; Select Internet Options-> Switch to Privacy Tab-> Drop down the slider under Settings and adjust the privacy setting to Medium->; Click ok-> to restart IE browser; The fourth type: the IE browser component is damaged or abnormal, and the IE component is tampered with or damaged by malicious plug-ins, resulting in the input verification code always being wrong; Solution: Click the Start menu-> Select Run-> Enter "REGSVR32 jscript.dll" (without quotation marks) at runtime, and press enter, and the system will prompt "DLLRegisterServer in jscript.dll succeeded", click OK-> Click Run again-> Enter "REGSVR32 vbscript.dll", and press enter, and the system will prompt "DLL in vbscript.dll". After two IE fixes, try to refresh the webpage and re-enter the verification code;