javascript - How to use variables in DOM CSS -


i want make webpage responsive using javascript. can tell me why doesn't work , how should this? 

document.getelementbyid("id1").style.left = variable;

very hard understand asking created fiddle passing variable show syntax. https://jsfiddle.net/b6clt0td/1/

<div id="id1">  </div> <input type="button" value="click me" onclick="somefunc()"/> <input type="button" value="move me" onclick="movefunc()"/> <script> function somefunc(){ var red ="red";  document.getelementbyid("id1").style.backgroundcolor = red; } function movefunc(){ var dist = 100;  document.getelementbyid("id1").style.left = dist +"px"; } </script>

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