@import url(smartphone.css) all and (max-width:740px);
@import url(tablet.css) all and (min-width:741px) and (max-width:980px);
@import url(netbook.css) all and (min-width:981px) and (max-width:1299px);
@import url(notebook.css) all and (min-width:1300px) and (max-width:1499px);
@import url(desktop.css) all and (min-width:1500px);