let nav_ul_1 = document.querySelector(".nav-ul-1").clientHeight;   
let nav_ul_2 = document.querySelectorAll(".nav-ul-2");
    for (let i = 0; i < nav_ul_2.length; i++) {   
    if (nav_ul_1 > nav_ul_2[i].clientHeight) {     
    nav_ul_2[i].style.height = nav_ul_1 + 'px'; 
    // nav_ul_2[i].style.top = -50 + 'px';  
    }
};

function nav_bodyBefore() {
let hover = document.querySelectorAll(".nav-ul-1 > li");
for (let i = 0; i < hover.length; i++){
hover[i].addEventListener("mouseover", function(){    
	 document.body.classList.add('nav-body'); 	 
});
hover[i].addEventListener("mouseout", function(){
    document.body.classList.remove('nav-body'); 	
});
}
};
nav_bodyBefore();