APEX

Hi All,


I had created a text area in apex, where the users can enter upto 10,000 characters.
Now i had wrote a javascript function to capture the specail charcters and replace it wth the key word characters.
But these are unicdoes characters and here is the code which i had done from end.
Can any one help me out how we can check if specail characters exists and replace with proper key word characters dynamically.
Apart from this i should be able to handle the {a-z/A-Z/0-9/Space and so on}

--

function ReplaceSpecialCharaters(){ 
var theString = document.getElementById('P1_ENG_NOTES').value;
alert("The value for text area is:"+theString);
var unicodeString = ''; 
var temp =''; 
for (var i=0; i < theString.length; i++) {   
 var theUnicode = theString.charCodeAt(i);
 alert("theUnicode-->"+theUnicode);

// if theUnicode in (unicode values of a-z A-Z 
if((theUnicode >= 97 && theUnicode <= 122) && (theUnicode >= 65 && theUnicode <= 90)){
temp=String.fromCharCode(theUnicode);
alert("Temp value is:"+temp);
   while (theUnicode.length < 4 ) { 
  alert("hi in while");    
 theUnicode = '0' + theUnicode;    } 

}else{
alert("It is going inside the else loop");
unicodeString += String.fromCharCode(theString.charCodeAt(i));
alert("the Example process of unicodeString is"+unicodeString); 
 /*unicodeString += theString.charCodeAt(i);*/
}
   theUnicode = '\\u' + theUnicode; 
alert("The unicode value is "+theUnicode);
  
 unicodeString += temp;
temp='';

  }  

alert("The value is "+unicodeString); 
document.getElementById('P1_ENG_NOTES').value = unicodeString;
//doSubmit('Notes');
return true;

}


Thanks,
Anoo..