function showTab(select, count, tabID, contentID, optionalClass) {
    if (optionalClass == undefined) {
        optionalClass = '';
    } else {
        optionalClass = ' ' + optionalClass;
    }
    for( i=1; i<=count; i++ ) {
    	if(document.getElementById( contentID+i ) != undefined){
	        var old = document.getElementById( contentID+i );
	        old.style.display = 'none';
    	}
        var oldMenu = document.getElementById( tabID+i );
        var classes = oldMenu.className;
        var positionSTB = classes.search('selected_tab');
        if (positionSTB > -1) {
            classes = classes.substr(0, positionSTB);
        }
        oldMenu.className = classes;

    }
    if(document.getElementById( contentID+select ) != undefined){
	    var current = document.getElementById( contentID+select );
	    current.style.display = 'block';
    }
    var currentMenu = document.getElementById( tabID+select );
    var classes = currentMenu.className;
    if (classes != '') {
        currentMenu.className = classes+' selected_tab'+optionalClass;
    } else {
        currentMenu.className = 'selected_tab'+optionalClass;
    }
}
function isInt(x) {
	var y=parseInt(x);
	if (isNaN(y)) return false;
	return x==y && x.toString()==y.toString();
}
function showTabMenu(select, count, tabID, contentID) {
	for( i=1; i<=count; i++ ) {
		if(document.getElementById( contentID+i ) != undefined){
			console.log('chowamy contentID+i');
			var old = document.getElementById( contentID+i );
			old.style.display = 'none';
			var oldMenu = document.getElementById( tabID+i );
			var classes = oldMenu.className;
			classes = classes.replace(' selected_tab', '');
			classes = classes.replace('selected_tab', '');
			oldMenu.className = classes;
		}
	}

	if(document.getElementById( contentID+select ) != undefined){
		var current = document.getElementById( contentID+select );
		current.style.display = 'block';
	}
	var currentMenu = document.getElementById( tabID+select );
	var classes = currentMenu.className;
	if (classes != '') {
		currentMenu.className = classes+' selected_tab';
	} else {
		currentMenu.className = 'selected_tab';
	}

}