function collapse(id_prefix, index, osszes) {
	for (i = 1; i <= osszes; i++) {
		if (document.getElementById(id_prefix+""+i).className.indexOf("display_none") === -1) {
			document.getElementById(id_prefix+""+i).className += " display_none";
			document.getElementById("tab_"+i).className = "top10_tab";
		}
	}
	newclass = document.getElementById(id_prefix+""+index).className;
	document.getElementById(id_prefix+""+index).className = newclass.replace(/display_none/,"");

	document.getElementById("tab_"+index).className = "top10_tab_a";
}