var pageisloaded=0;
window.addEvent('load',function(){
 pageisloaded=1;
});



function navplus(){
  if (pageisloaded) {

		var actu = parseInt(document.getElementById("nav_actu").innerHTML);
		var navmax = parseInt(document.getElementById("navmax").innerHTML);
		if(actu == navmax){
			document.getElementById("nav_actu").innerHTML = 1;
		}else{
			document.getElementById("nav_actu").innerHTML = actu +1;
		}
    }
}
function navmoin(){
	if (pageisloaded) {

	var actu = parseInt(document.getElementById("nav_actu").innerHTML);
	var navmax = parseInt(document.getElementById("navmax").innerHTML);
	if(actu == 1){
		document.getElementById("nav_actu").innerHTML = navmax;
	}else{
		document.getElementById("nav_actu").innerHTML = actu -1;
	}
  }
}