The value property sets or gets the value of the attribute.
The following code gets the value of the <button> element's first attribute:
var x = document.getElementsByTagName("BUTTON")[0].attributes[0].value;
Click the button to display the value of the button's first attribute value.
<!DOCTYPE html> <html> <body> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {// www .j av a 2 s . co m var btn = document.getElementsByTagName("BUTTON")[0]; var x = btn.attributes[0].value; document.getElementById("demo").innerHTML = x; } </script> </body> </html>
The value property returns a String representing the value of the attribute.