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Need to alert the value of a <select> onchange, how do I do it?

Hello,

When the user selects a car in the second drop down menu, I would like the value of the two select boxes to alert. How do I do that? below is the code?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script type="text/javascript">
function printNames(a) {
alert(a)

};
</script>

</head>

<body>
<select name="car1" id="car1">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select>

<select name="car2"  onchange="printNames(this.options[this.selectedIndex].value, document.getElementById('car1').options[this.selectedIndex].value">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select>
</body>
</html>

Open in new window

Ronak Patel

try this:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script type="text/javascript">
function printNames(objSelect2, objSelect1) 
{
	var car1 = objSelect1.value;
	var car2 = objSelect2.value;

	alert("Car 1: " + car1 + "\n\nCar 2: " + car2);

}
</script>

</head>

<body>
<select name="car1" id="car1">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select>

<select name="car2" id="car2" onchange="printNames(this, document.getElementById('car1'));">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select>
</body>
</html>

Open in new window

Mrunal

Here is your solution:

http://jsfiddle.net/ECzsg/

Mrunal

For javascript version:

http://jsfiddle.net/ECzsg/1/

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Need to alert the value of a &lt;select&gt; onchange, how do I do it?

Need to alert the value of a <select> onchange, how do I do it?