var menu_off_delay = 100;
var menu_count=4;
var tab_count=5;
function getObj(obj){
	if(document.layers)	return document.layers[obj];
	else if(document.all) return document.all[obj].style;
	else return document.getElementById(obj).style;
}
function show(what){
	for(var i=1; i<=tab_count; i++) {
		if(i==what) continue;
		hide(i);
	}
	if(what <= menu_count )
		getObj('menu-'+what).display = "block";
	getObj('tab-'+what).backgroundColor="#99cc33";
}
function hide(what){
	if(what <= menu_count )
		getObj('menu-'+what).display = "none";
	getObj('tab-'+what).backgroundColor="";	
}
function out(what) {
	var e = window.event;
	var tg = (window.event) ? e.srcElement : e.target;
    if (tg.nodeName == "DIV") {
        //setTimeout('hide('+what+');',menu_off_delay);
		hide(what);
    }
}
function color(what){
	for(var i=1; i<=tab_count; i++) {
		if(i==what) continue;
		uncolor(i);
	}
	getObj('tab-'+what).backgroundColor="#99cc33";
}
function uncolor(what){
getObj('tab-'+what).backgroundColor="";	
}
function img_link(is_big) {
 //var img = new Image();
 var img = is_big ? '/img/'+Math.round(Math.random()*6+1)+'_big.jpg' : '/img/'+Math.round(Math.random()*6+1)+'.jpg';
 getObj('bgimg').backgroundImage = 'url('+img+')';
 return img;
}