function set_bg_pic(id, url) {
	var elem = document.getElementById(id);

	if (browser() == 'IE') {
		elem.style.backgroundImage = 'none';
		elem.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src="+ url +")";
	} else {

		elem.style.backgroundImage = 'url('+url+')';

	}

}

function browser() {
	var name = navigator.appName;
	if (name.substring(0,3)=="Mic") {
		return 'IE';
	} else {
		return 'NS';  
	}
}

function set_backgnd(ids,urls) {
	if (ids.length != urls.length)
		return;
	for (var i=0; i<ids.length; i++) {
		var elem = document.getElementById(ids[i]);
		if (!elem) continue;
		set_bg_pic(ids[i], urls[i]);		
	}
}

function show_hide(id) {
	var div = document.getElementById(id);
	var state = div.style.display;
	if (state == 'block')
		div.style.display = 'none'; 
	if (state == 'none')
		div.style.display = 'block';
}

function readCookie(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
                var c = ca[i];
                while (c.charAt(0)==' ') c = c.substring(1,c.length);
                if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
}


function check_cookie(id) {
  	if (readCookie(id+'_has_mark')) {
		new Ajax.Updater( 'vote',  '/db/voting.html?stat=1') ; return false;
  	}
}