Multiplying Numbers:

The Script:

<script type="text/javascript">
function multiply(){
var tot=1,a=arguments,b=a.length;
for(var i=0;i<b;i++){
if(isNaN(a[i]) || !a[i]){continue;}
tot*=a[i];
}
return tot;
}
</script>

The example:

<script type="text/javascript">
alert(multiply(1,2,3,4,5));
</script>

Try it

More Maths.