应网友的要求又用javascript实现了一个。用了正则虽然编码方便一些，但是难以描述错误的格式，所以只能处理结构正确的csv了，而且某些特殊的情况下也有可能解析错误：
var st = 'asdf,"""asd,fgg""","asd""fgh","as""d,f""gh",ab cd ef\nasdf,"asd"",""fgg","asd""fgh","as""d,f""gh",ab cd ef\nasdf,"asd,fgg","asd""fgh","as""d,f""gh",ab cd ef';
st = st.replace(/([^,])""([^,])/g,"$1$quote;$2")
st = st.replace(/""/g,"$quote;")
st = st.replace(/,"/g,",$left;")
st = st.replace(/",/g,"$right;,")
var ar = st.split("\n");
var result = [];
for(var i=0;i<ar.length;i++){
var a= ar[i].split(",");
for(var j=0;j<a.length;j++){
if(/\$left;/.test(a[j]) && !(/\$right;/.test(a[j]))){
a[j]=a[j]+","+a[j+1];
a.splice(j+1,1);
j--;
}else{
a[j]=a[j].replace(/(\$left;)|(\$right;)/g,"").replace(/\$quote;/g,'"');
}
}
result[i]= a;
}
document.write("<table border=1>")
for(var i=0;i<result.length;i++){
document.write("<tr>");
for(var j=0;j<result[i].length;j++)
document.write("<td>"+result[i][j]+"</td>");
document.write("</tr>");
}
document.write("</table>")