javascript function page size
//function for screen resize
function screen_resize() {
var h = parseInt(window.innerHeight);
var w = parseInt(window.innerWidth);
if(w <= 500) {
//max-width 500px
// actions here...
red();
} else if(w > 500 && w <=850) {
//max-width 850px
// actions here...
orange();
} else {
// 850px and beyond
// actions here...
green();
}
}