var divisor1 = document.getElementById("divisor1"),
    handle1 = document.getElementById("handle1"),
    slider1 = document.getElementById("slider1");

function moveDivisor1() {
  handle1.style.left = slider1.value+"%";
	divisor1.style.width = slider1.value+"%";
}

window.onload = function() {
	moveDivisor1();
};