Java EE (Java Enterprise Edition) General Discussion

I have been trying to figure out my problem for several hours, but still didn't get it. Hope to get an idea from you guys. My code is as follows:

var astr;
var outCr ="|";
var outLf = "\u0000";
var cr = "\n";
var lf ="\r";
var ddQuote=""";
var dtQuote='\"';
astr = "<%=firstDesc%>";

astr.replace(outCr,cr);
astr.replace(outLf,lf);
astr.replace(ddQuote, dtQuote);
while (astr.indexOf(outCr) > 0) {
z = astr.indexOf(outCr);
astr = astr.substring(0, z) + cr + astr.substring(z+1,astr.length );
}

while (astr.indexOf(outLf) > 0) {
z = astr.indexOf(outLf);
astr = astr.substring(0, z) + lf + astr.substring(z+1,astr.length );
}

while (astr.indexOf(ddQuote) > 0) {
z = astr.indexOf(ddQuote);
astr = astr.substring(0, z) dtQuote astr.substring(z+1,astr.length );
}
document.form1.description.value=astr;

The value of firstDesc is a very big string from the database that contains carriage return, linefeed, single quote and double quote. It needs to be displayed in a HTML text area. Now everything works fine except the double quote. A firstDesc value containing double quote will not appear in the text area, and it even stop my jsp page and disable other buttons. But if I get rid of the code handling the double quote, everything works fine. What's the problem?