I want to ignore counting the length of characters in the text if there are special codes inside in textarea. I mean not to count the special codes characters in the text. I use special codes to define inputing smileys in the text. I want to count only the length of the text ignoring special code.

Here is my approximate code I tried to write, but can't let it work:

// smileys
// =======

function smileys(){

var smile = new Array();

smile[0]  = "[:rolleyes:]";
smile[1]  = "[:D]";
smile[2]  = "[:blink:]";
smile[3]  = "[:unsure:]";
smile[4]  = "[8)]";
smile[5]  = "[:-x]";

return(smile);
}

// symbols length limitation
// =========================

function minSymbols(field){

var get_smile = smileys();
var text = field.value;

for(var i=0; i<get_smile.length; i++){
for(var j=0; j<(text.length); j++){
if(get_smile[i]==text[j]){
text = field.value.replace(get_smile[i],"");
}
}
}

if(text.length < 50){
document.getElementById("saveB").disabled=true;
} else {
document.getElementById("saveB").disabled=false;
}
}

How the script should be in order to let it work? Thank you!