function getobject(oname){
	if(document.all && document.all(oname)) {
		return document.all(oname);
	}
	else {
		if(document.getElementById && document.getElementById(oname)) {
      			return document.getElementById(oname);
    		}
  	}
}

function get_random() {
	var number = Math.random();
	number = number * 4;
	number = Math.floor(number);

	switch(number) {
		case 0:
		get_ikariam();
		break;

		case 1:
		get_ogame();
		break;

		case 2:
		get_kingsage();
		break;

		case 3:
		get_katsuro();
		break;
	}
}

function get_ogame() {
	var ikariam = getobject('ikariam');
	var ogame = getobject('ogame');
	var kingsage = getobject('kingsage');
	var katsuro = getobject('katsuro');
	var load = getobject('load');

	ikariam.style.visibility = 'hidden';
	kingsage.style.visibility = 'hidden';
	ogame.style.visibility = 'visible';
	katsuro.style.visibility = 'hidden';

	load.style.visibility = 'hidden';
}

function get_ikariam() {
	var ikariam = getobject('ikariam');
	var ogame = getobject('ogame');
	var kingsage = getobject('kingsage');
	var katsuro = getobject('katsuro');
	var load = getobject('load');

	ikariam.style.visibility = 'visible';
	kingsage.style.visibility = 'hidden';
	ogame.style.visibility = 'hidden';
	katsuro.style.visibility = 'hidden';

	load.style.visibility = 'hidden';
}

function get_kingsage() {
	var ikariam = getobject('ikariam');
	var ogame = getobject('ogame');
	var kingsage = getobject('kingsage');
	var katsuro = getobject('katsuro');
	var load = getobject('load');

	ikariam.style.visibility = 'hidden';
	kingsage.style.visibility = 'visible';
	ogame.style.visibility = 'hidden';
	katsuro.style.visibility = 'hidden';

	load.style.visibility = 'hidden';
}

function get_katsuro() {
	var ikariam = getobject('ikariam');
	var ogame = getobject('ogame');
	var kingsage = getobject('kingsage');
	var katsuro = getobject('katsuro');
	var load = getobject('load');

	ikariam.style.visibility = 'hidden';
	kingsage.style.visibility = 'hidden';
	ogame.style.visibility = 'hidden';
	katsuro.style.visibility = 'visible';

	load.style.visibility = 'hidden';
}