Div class not getting displayed

[peliman]

I am trying to display a chat box that I created for my website. It worked fine on my computer, but when I try it on my friend's, it doesn't really work at all!Here's the code for the chat box :\[code\]<div class="chat_box1"><div id="chat_box_bar"> <p> (SOME PHP CODE HERE) </p> <p id="close_chat" onclick="close_chat_box(1)">X</p></div></div>\[/code\]The CSS for the above code is:\[code\].chat_box1,.chat_box2,.chat_box3{display: block;width: 20%;position: fixed;margin-top:70%;margin-right: 10px;border-style: solid;border-width: thin;height:30%;font-family: comic sans ms;font-size: 12px;}\[/code\]As obvious, the same CSS applies for other 2 chat-boxes too. But none of them getting displayed on the page. Help me out guys!