var currentNode = document.querySelect("#myNode")
//gets sibling element
var nextSibling = currentNode.nextElementSibling;
while(true){
// if no more elements break
if(nextSibling == null) break;
//proccess the nextNode
// --------
//get the next node for the next iteration of the cycle
nextSibling = nextSibling.nextElementSibling;
}