How can we call the javascript function from the Salesforce Apex class?

Hello Mohit,

Try this,

<apex:page controller="calljavascript_cls" >

<script>

function func()

{

alert('function calling');

}

</script>

<apex:outputText value="{!callfunc}" escape="false"></apex:outputText>
<apex:outputText value="{JavaScript}" ></apex:outputText>
</apex:page>

-------------------------------

apex controller

public class calljavascript_cls

{

public string callfunc{get;set;}

public calljavascript_cls()

{

callfunc='<script> func(); </script>';

}

}