Is it possible to call javascript function in an apex controller?

Try It:-
https://developer.salesforce.com/forums/?id=906F000000093zeIAA

• This reply was modified 8 years ago by  Satya.
• This reply was modified 8 years ago by  Satya.

Hi,

I found this online, try this and let me know-

Controller - 

public class showAlertRandom {
public boolean showAlert { get; set; }
public Decimal numberValue { get; set; }
public showAlertRandom() {
doRandomAlert();
}
public void doRandomAlert() {
numberValue = Math.random();
showAlert = numberValue < 0.5;
}
}

VF page - 

<apex:page controller="showAlertRandom" showHeader="true">
<apex:form id="form">
<apex:outputText rendered="{!showAlert}" id="alert">
<script>
alert('Hello World');
</script>
</apex:outputText>
<apex:outputText rendered="{!not showAlert}" id="noAlert">
No alert this time, sorry. Random value was: {!numberValue}.
</apex:outputText>
<apex:actionPoller interval="5" action="{!doRandomAlert}" reRender="form" />
</apex:form>
</apex:page>

Hope this helps.