.res_s { display:none !important; } /* 600 or less */
.res_sm { display:none !important; } /* 800 or less */
.res_m { display:none !important; } /* 1000 or less */
.res_ml { display:none !important; } /* 1100 or less */
.res_l { display:inline-block !important; }  /* 1200 or greater */

@media only screen and (min-width: 0px) and (max-width: 1000px)
{
    .res_l { display:none !important; }  /* 1200 or greater */
    .res_m { display:inline-block !important; } /* 1100 or less */
}

@media only screen and (min-width: 0px) and (max-width: 800px)
{
    .res_l { display:none !important; }  /* 1200 or greater */
    .res_m { display:none !important; } /* 1000 or less */
    .res_sm { display:inline-block !important; } /* 600 or less */
}

@media only screen and (min-width: 0px) and (max-width: 600px)
{
    .res_l { display:none !important; }  /* 1200 or greater */
    .res_m { display:none !important; } /* 1000 or less */
    .res_sm { display:none !important; } /* 800 or less */
    .res_s { display:inline-block !important; } /* 600 or less */
}