function check (){
     var len = arguments.length;
      myflag = true;
      for (var i = 0 ; i <  len ; i++)  {
        var myvalue = arguments[i].value;
       if (myvalue  ==  "")   {   myflag = false;
           alert("必須項目の記入漏れです");
          document.form1.fromname.focus();  
       return myflag;   }   }
      myvalue = arguments[0].value;
      if ((myvalue.indexOf("@")) == -1)  {　myflag = false;
          alert("メールアドレスが違います");
          document.form1.frommail.focus(); 
      return myflag;
      }
       document.getElementById("sent").disabled = true;
       return myflag;
     }