Based on Adding a parameter to the URL with JavaScript i tried to make a script that adds parameters to the existing URL but kinda failed and i don't know why...
<script type="javascript">
function insertParam(key, value)
{
key = encodeURI(key); value = encodeURI(value);
var kvp = document.location.search.substr(1).split('&');
var i=kvp.length; var x; while(i--)
{
x = kvp[i].split('=');
if (x[0]==key)
{
x[1] = value;
kvp[i] = x.join('=');
break;
}
}
if(i<0) {kvp[kvp.length] = [key,value].join('=');}
//this will reload the page, it's likely better to store this until finished
document.location.search = kvp.join('&');
}
</script>
<label>
<select name="id" onchange="window.location='somepage.php?page=inserari-note&selected_value='+this.value">
<option>--Alege user--</option>
<?php
while($runrows = mysql_fetch_assoc($run))
{
$user = $runrows ['user_login'];
echo"<option value=\"$user\">$user</option>";
}
?>
</select>
</label>
<label>
<select name="idelev" onchange="insertParam('selected_valueelev',+this.value)">
<option>--Alege Elev--</option>
<?php
while($runrows4 = mysql_fetch_assoc($run4))
{
$elev = $runrows4 ['Nume'];
echo"<option value=\"$elev\">$elev</option>";
}
?>
</select>
</label>
So the first select is populating the second select with students and also change the URL into somepage.php?page=inserari-note&selected_value='+this.value which works great but when i click on the options from the second select, nothing happens. In my opinion it should add at the existing URL which is the one i have mentioned before, the values &selected_valueelev="chosen-option" so that the URL should look like let's say somepage.php?page=inserari-note&selected_value=user&selected_valueelev=student. What am i doing wrong?
