Return the top position of a <div> element:
alert(document.getElementById("myDiv").style.top);
<!DOCTYPE html> <html> <body> <div id="myDiv" style="position:absolute;top:75px;">This is a div.</div> <button type="button" onclick="myFunction()">Return top position of div</button> <p id="demo"></p> <script> function myFunction() {/* w w w.j a va 2s.c om*/ document.getElementById("demo").innerHTML = document.getElementById("myDiv").style.top; } </script> </body> </html>