<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/> <link rel="stylesheet" type="text/css" href="css/bootstrap.css" /> </head> <body> <nav class="navbar navbar-default"> <div class="container-fluid"> </div> </nav> <div class="col-md-6 well"> <hr style="border-top:1px dotted #ccc;"/> <div class="col-md-6"> <div class="form-group"> <input type="range" oninput="changeRadius(this);" value="0" min="0" max="150"/> </div> <center> <div class="form-inline"> <input type="text" id="slide_text" class="form-control" value="0" size="4" readonly="readonly"/> </div> </center> </div> </div> </body> </html>
function changeRadius(slider){ var input=document.getElementById("slide_text"); input.value=slider.value; document.getElementById("target").style.borderRadius=slider.value+"px"; }