validate select tag items in javascript
validate select tag items in javascript
Hi,
How to validate addition of two numbers from two different <select> tag items in JavaScript..?
Thanks in advance.
View Answers
December 7, 2012 at 3:27 PM
Here is an example that validates HTML select tag and find the addition of two numbers selected from the select tag.
<html>
<script language = "Javascript">
function validate(){
if(document.form.n1.selectedIndex==""){
alert ( "Please select first number!" );
return false;
}
if(document.form.n2.selectedIndex==""){
alert ( "Please select second number!" );
return false;
}
var v1=document.form.n1.value;
var v2=document.form.n2.value;
var sum=parseInt(v1)+parseInt(v2);
alert("Sum of two numbers: "+sum);
return true;
}
</script>
<form name="form" method="post" onSubmit="return validate()">
<pre>
Select Number1 <select name="n1">
<option value="Select">Select</option>
<option value="10">10</option>
<option value="20">20</option>
<option value="30">30</option>
<option value="40">40</option>
<option value="50">50</option>
</select>
Select Number2 <select name="n2">
<option value="Select">Select</option>
<option value="60">60</option>
<option value="70">70</option>
<option value="80">80</option>
<option value="90">90</option>
<option value="100">100</option>
</select>
<input type="submit" name="Submit" value="Submit">
</pre>
</form>
</html>
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