@charset "utf-8";
body,p { margin:0; padding:0; }
#no1 { width:300px; background-color:lime;}
#no2 { width:300px; background-color:yellow;}
#no3 { width:275px; background-color:aqua;}
#no4 { width:250px; background-color:olive;}
#no5 { width:300px; background-color:fuchsia;}
#no3_hide { width:275px; display:none; background-color:white; }
#no4_hide { width:250px; display:none; background-color:silver; }