addition of two combobox values using jsp and javascript

How to make addition of two combobox values using jsp and javascript?

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April 4, 2012 at 3:11 PM

<html>
<h2>ComboBox</h2>
<script language="javascript">
var arr = new Array();
arr[0] = new Array("-select-");
arr[1] = new Array("Maharashtra","Karnataka","Kerela","Rajashthan");
arr[2] = new Array("Texas","New York","Florida","California");

function change(combo1)
{
document.getElementById("sel").style.visibility="visible";
var comboValue = combo1.value;
document.forms["form"].elements["combo2"].options.length=0;
for (var i=0;i<arr[comboValue].length;i++)
{
var option = document.createElement("option");
option.setAttribute('value',i+1);
option.innerHTML = arr[comboValue][i];
document.forms["form"].elements["combo2"].appendChild(option);
}
}
</script>
<form name="form" method="post">
<select name="combo1" onchange="change(this);">
<option value="0">-Select-</option>
<option value="1">India</option>
<option value="2">USA</option>
</option>

</select><br />
<select id="sel" name="combo2" style="visibility:hidden;">
</select>
</form>
</html>

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