Javascript Special Character Replace String

I have an asp page with Javascrippt.  The page uses a thrid party component that does a mouse oever effect which pulls data from my database table.  I am having the problem that special characters are creating an unterminated string error.

I have gotte around the most common one by using the script below to delete out the apostrophes.  I have a new client that needs to see those apostrophes and also any other special character.

function apostoquote()
 {
 var replacewith="";
 var oldstring=FrontPage_Form1.QuestionHelp.value;
 var newstring=oldstring.replace(/'/g,replacewith);
 {
FrontPage_Form1.QuestionHelp.value=newstring
}
}

So I need a script that will
Check the entire FrontPage_Form1.QuestionHelp.value string, find all special characters (!,@,#,$,%,^,&,*,(,),_,+,|,{,},[,], carriage return, tab,',",:,;,?,<,>,.,/) and replace them with code that will work in HTML.

THANKS