Min dropdown list ändrar värde efter reload

<form name="drop">
<select class="droplist" name="SelectURL" onChange="document.location.href=document.drop.SelectURL.options[document.drop.SelectURL.selectedIndex].value">
<option value="index.php">index
<option value="test1.php">- test1
<option value="test2.php">- test2
<option value="test3.php">- test3
<option value="test4.php">- test4
</select>
</form>

function jumpto(x){
if (document.drop.jumpmenu.value != "null") {
document.location.href = x
}
}

<form name="drop">
<select class="droplist" name="jumpmenu" onChange="jumpto(document.drop.jumpmenu.options[document.drop.jumpmenu.options.selectedIndex].value)">