Javascript DOM HTML Input Hidden value Property set

Introduction

Change the value of the hidden field: 

document.getElementById("myInput").value = "USA";

Click the buttons to display and/or change the value attribute of the hidden input field.

View in separate window 

<!DOCTYPE html>
<html>
<body>

A hidden input field:
<input type="hidden" id="myInput" name="country" value="CSS">
<p id="demo"></p>
<button onclick="display()">Display value</button>
<button onclick="change()">Change value</button>

<script>
function display() {
  var x = document.getElementById("myInput").value;
  document.getElementById("demo").innerHTML = "The value of the hidden input field is: " + x;
}

function change() {//from   w ww  .jav a2s.  c o  m
  var x = document.getElementById("myInput").value="HTML";
  document.getElementById("demo").innerHTML = "The value was changed to: " + x;
}
</script>

</body>
</html>



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