function tabstabs(tabNum, elemNum, mItemCounter) {
	var el01 = '';
	for (var i=1; i<=mItemCounter; i++) {
		if (document.getElementById('tab'+tabNum+i)) {document.getElementById('tab'+tabNum+i).style.display = (i!= elemNum)?'none':'block'}
		el01 = document.getElementById('item'+tabNum+i);
		if (el01) {
			if (i!=elemNum) {
				el01.className=el01.className.replace(new RegExp("_act\\b"), "");
			}  else {
				if (el01.className.indexOf("_act")<0) {el01.className+='_act'}
			}
		}
	}
}