function Remplace(expr,a,b)
{
	var i=0
	while (i!=-1) {
		i=expr.indexOf(a,i);
		if (i>=0) {
			expr=expr.substring(0,i)+b+expr.substring(i+a.length);
			i+=b.length;
		}
	}
	return expr
}

function betaautotitle()
{
	phrase = betaautotitle.arguments[0];
	
	for(i=1;i<betaautotitle.arguments.length;i++)
	{
		Item = $("alias_"+betaautotitle.arguments[i]);
		selItem = Item.selectedIndex;
		phrase = Remplace(phrase,"%"+betaautotitle.arguments[i]+"%",Item.options[selItem].text);
	}
	
	phrase = Remplace(phrase," >>","");
	
	document.uploader.nom.value = phrase;
}