从html页面打开默认邮件客户端，该页面必须将数据传递到超过4000个字符的“TO”字段

I can either use java or html to do this. I have tried using window.open(), but there is a cap on the length of string passed. I have tried using runtime.exec(), but with no luck. Can anyone suggest any other method for achieving this. I am not supposed to use java swing to achieve this. The java runtime I use is java 1.5.Please help me regarding this. I can either use java or html to do this. I hav