var d = document;
  
function resizeBox(){
s0bj1 = d.getElementById("container1").style
s0bj2 = d.getElementById("container2").style
if(d.body.clientWidth) (d.body.clientWidth>1200) ? s0bj1.width = "1200px" :  s0bj1.width = "100%" 
if(d.body.clientWidth) (d.body.clientWidth<1000) ? s0bj2.width = "980px" :  s0bj2.width = "100%"
}
  
onload = resizeBox;
onresize = resizeBox;