yourname.onSetFocus = function() {
    this.text = "";
    delete this.onSetFocus;
};
yourmes.onSetFocus = function() {
    this.text = "";
    delete this.onSetFocus;
};
yourmail.onSetFocus = function() {
    this.text = "";
    delete this.onSetFocus;
};
submit_btn.onRollOver=function(){
    this.gotoAndStop(2);
}
submit_btn.onRollOut=function(){
    this.gotoAndStop(1);
}
submit_btn.onRelease=function(){
    LO = new LoadVars ();
    LO.mailmsg = yourmes.text;
    LO.fn = yourname.text
    LO.mail = yourmail.text
    LO.sendAndLoad ("http://www.XXXXXXX.ru/sendmail.php" , result_lv ,"POST");

    yourname.text=""
    yourmail.text=""
    yourmes.text=""
    
}
System.useCodepage = true;

LO.send ("http://www.XXXXXXX.ru/sendmail.php" , "_self");