var randomlinks=new Array()

randomlinks[0]='<script type="text/javascript" src="scripts/block-01.js"></script>'
randomlinks[1]='<script type="text/javascript" src="scripts/block-02.js"></script>'

<!--Keep as is-->

function randomlink(){
var add = randomlinks[Math.floor(Math.random()*randomlinks.length)]
return(add)
}

document.write( randomlink() );