When scroll comes to element something happening

Template scroll window to element

/*TEMPLATE CODE FOR SCROLL WINDOW TILL CONCRETE ELEMENT*/
 function scrollElement(event, arr, funcBottom, funcTop) {
  for(var i = 0; i < arr[0].length; i++) { //Zero elememt of array is the main collaction of our func.
    var cordsSkill = arr[0][i].getBoundingClientRect().top,
    num = parseFloat(arr[0][i].textContent),
    cordsScroll = window.pageYOffset + document.documentElement.clientHeight;

    if(cordsScroll >= cordsSkill + window.pageYOffset) {
      funcBottom(i, num);
    }
    if(cordsScroll <= cordsSkill + window.pageYOffset) {
      funcTop(i, num);
    }
  }
 }