// er wordt maar iets in current_id gezet
var current_id=1;

window.onload=function(){
    for (var x = 1; x <= 10; x++)
    {
        if (document.getElementById("atab_"+x))
        {
    	    current_id = x;
	    break;
        }
    }
}

function toggleTab(id) {

	document.getElementById("atab_"+current_id).className = "";

	document.getElementById("atab_"+id).className = "active";
	
	if(id!=current_id) {
		document.getElementById("ptab_"+current_id).style.display = "none";
	}
	
	current_id = id;
	document.getElementById("ptab_"+current_id).style.display = "inline";
}