hello pplz, i need someone to code me something

it is: when ur in like a page you hit send alert it would show up on The main page



EX: Say i was at www.yourdomain.com/lol and i wrote the message i wanted in a box and hit send it would show up on www.yourdomain.com

?? PLEASE CODE IT FOR ME AND ZIP IT ??

PLEASE NOTE I DO NOT WANT TO EDIT A DJ PANEL OR USE ONE lolz