function CheckEmail(email) {
		 ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";
		 ok2 = "[].@-_";

    for(i=0; i < email.length ;i++){
        if(ok.indexOf(email.charAt(i))<0){
      //  alert("email信箱格式不对!\n");
            return (false);
        }
    }
       if(ok2.indexOf(email.charAt(0))>=0){
       // alert("email信箱格式不对!\n");
            return (false);
        }

          if(ok2.indexOf(email.charAt(email.length-1))>=0){
      //  alert("email信箱格式不对!\n");
            return (false);
        }

    if(!((email.indexOf('@', 0) != -1) && (email.indexOf('.', 0) != -1) && (email.length>5)))
    { //alert("email信箱格式不对!\n");
    return false;
    	}
      if(email.indexOf('@') !=email.lastIndexOf('@'))
    { //alert("email信箱格式不对!\n");
    return false;
    	}
    return true;
}