activateMenu = function(nav) {

    /* currentStyle restricts the Javascript to IE only */
	//if (document.all && document.getElementById(nav).currentStyle) {  
        var navroot = document.getElementById(nav);
        
        /* Get all the list items within the menu */
        var lis=navroot.getElementsByTagName("LI");
        for (i=0; i<lis.length; i++) {
           /* If the LI has another menu level */
            if(lis[i].lastChild.tagName=="UL"){
                /* assign the function to the LI */
             	lis[i].onmouseover=function() {	
                
                   /* display the inner menu */
                   this.lastChild.style.display="block";
                }
                lis[i].onmouseout=function() {                       
                   this.lastChild.style.display="none";
                }
            }
        }
    //}
}
window.onload= function(){
    activateMenu('nav'); 
}

function ujTipp() { 
	var http_request = false;

	if (window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
	} else if (window.ActiveXObject) {
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}

	http_request.onreadystatechange = function() {
		if (http_request.readyState == 4) {
			if (http_request.status == 200) {
				document.getElementById("tippek").innerHTML = '<a href="javascript:ujTipp()" title="Következő tipp megjelenítése">Tipp:</a>&nbsp;'+http_request.responseText;
			}
		}
	}
	http_request.open('GET', 'tipp.php?rand='+Math.random(), true);
	http_request.send(null);
}