function getElementsByClass(tag, name) {
	var elem = document.getElementsByTagName(tag);
	var arr = new Array();
	for(i = 0,iarr = 0; i < elem.length; i++) {
		att = elem[i].getAttribute("class");
		if(att == name) {
			arr[iarr] = elem[i];
			iarr++;
		}
     }
     return arr;
}

function hider(search_string) {
	search_string = search_string.replace(/\s/, "_");
	mod_all(1);
	re = new RegExp(search_string, 'i');
	all = getElementsByClass("div", "journal");
	for(var i = 0; i < all.length; i++) {
		if (re.exec(all[i].id)) {
			all[i].style.display = 'inline';
		} else {
			all[i].style.display = 'none';
		}
	}
}

function mod_all(mod) {
	all = getElementsByClass("div", "inform");
	if (mod == 0) {
		for(var i = 0; i < all.length; i++) {
			all[i].style.display = 'inline';
		}
	} else {
		for(var i = 0; i < all.length; i++) {
			all[i].style.display = 'none';
		}
	}
}