C style pointers in jscript

i think what he wanted is to pass a variable by reference to a function, and once the stored value of the parameter was chaged inside the function the outside variable also changed (hence they point to same memory address).. but javascript/jscript supports only passing by value.

<script language="javascript">

var var1 = 25;
change(var1);
alert(var1); // var1 is still has a value of 25

function change(param1) {
param1 = param1 / 5;
return;
}

</script>