Untitled

<html>
<style>
#dv{

border:1px solid red;
background-color:#344;
height:80px;
position:absolute;
}
#dv2{

border:1px solid black;
background-color:#f00;
height:80px;
position:absolute;

}


</style>
<body>
<div id = "dv"></div>
<div id = "dv2"></div>
<script>
var valor = 0;
var valor2 = 180;
var dv= document.getElementById("dv");
var div2 = document.getElementById("dv2");

var largura = dv.style.width = 80;
var lateral = div2.style.left = 180;
var largura2 = div2.style.width = 80;
var lateral2 = div2.style.top = 300;

function moverDiv(){
valor += 5;
dv.style.left = valor+"px";


if(valor+largura > lateral){
div2.style.backgroundColor = "blue";


}
}
dv.addEventListener("touchmove",moverDiv);


</script>
</body>
</html>