function headerHeight() {
var winSize = document.body.clientWidth;
if (winSize > 810 && winSize < 1050) {
document.getElementById("header").style.height = "170px";
} else if (winSize >= 1050) {
document.getElementById("header").style.height = "220px"; 
}
 else {
document.getElementById("header").style.height = "120px";
}
}