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chriscloyd

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try this function. add to your select field onchange = "updateDropDown();" and put that select box in its own field or div or something with an unique id.

let me know if it works or not


[code]
function updateDropDown(){
var days = new Object();
days['Jan'] = 30;
days['Feb'] = 28;

var month = document.getElementById('month field').value;
for(keyVar in days){
if(keyVar == month){
dayCount = days[keyVar];
continue;
}
}

list = '<select >';
for(var i = 0; i < dayCount.length; i++){
day = i + 1;
list += '<option value="'+ day +'">'+ day +'</option>';
}
list += '</select>';

document.getElementById('idof field that holds your drop down').innerHTML = list;
}
[/code]
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