function validateform( )
{
    var address = document.getElementById("address");
    var xsender = document.getElementById("xsender");
    var comment = document.getElementById("comment");

    if( xsender.value.length == 0 )
    {
        xsender.value = 'enter your name here';
        xsender.focus( );
        xsender.select( );
        return false;
    }
    
    if( xsender.value == 'enter your name here' )
    {
        xsender.focus( );
        xsender.select( );
        return false;
    }

    if( address.value.length == 0 )
    {
        address.value = 'enter your e-mail address here';
        address.focus( );
        address.select( );
        return false;
    }
    
    if( address.value == 'enter your e-mail address here' )
    {
        address.focus( );
        address.select( );
        return false;
    }
    
    if( comment.value.length == 0 )
    {
        comment.value = 'enter your comments here';
        comment.focus( );
        comment.select( );
        return false;
    }
    
    if( comment.value == 'enter your comments here' )
    {
        comment.focus( );
        comment.select( );
        return false;
    }
    
    return true;
}