There is no function overload in JS, how to implement function overloading function?

There is no function overload in JS, Javasript uses optional parameters: arguments implements the same functionality.

The function does not define parameters at the time of definition:

<script type= "Text/javascript" >

function Say ()

{

for (var i = 0; i < arguments.length; i++) {
Alert (arguments[i].tostring ());
}
}
</script>

Call: <input type= "button" value= "input" id= "id" onclick= "Say (10,20)"/>

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There is no function overload in JS, how to implement function overloading function?