write inside a div

hey ppl. i am new here. looks like i will do some Js for years
i have a div called "farmacias" inside the content div
i want to write something in the div but this is not working
document.getElementById("farmacias").innerHTML='ola'
anyone knows why?

Works for me.

<div id = "container">
<div id = "farmacias">
</div>
</div>
<script type = "text/javascript">
document.getElementById("farmacias").innerHTML='ola'
</script>

Are you sure that the <div> exists at the time the script executes?


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