function menu(id){




document.getElementById('szemely').style.display = 'none';

document.getElementById('haszon').style.display = 'none';
document.getElementById('vevoszolgalat').style.display = 'none';
document.getElementById('wendom').style.display = 'none';
document.getElementById('rolunk').style.display = 'none';
document.getElementById('akcio').style.display = 'none';

document.getElementById(id).style.display = 'block';

opacity(id, 0, 100, 500); 



}

function bg(id){

	
	
 	document.getElementById('m1').className  = "none";
	document.getElementById('m2').className = 'none';
	document.getElementById('m3').className = 'none';
	document.getElementById('m4').className = 'none';
	document.getElementById('m5').className = 'none';
	document.getElementById('m6').className = 'none';
	document.getElementById('m7').className = 'none';
	
	document.getElementById(id).className = 'menubg';
	
		
	}

function opacity(id, opacStart, opacEnd, millisec) { 
    //speed for each frame 
    var speed = Math.round(millisec / 100); 
    var timer = 0; 

    //determine the direction for the blending, if start and end are the same nothing happens 
    if(opacStart > opacEnd) { 
        for(i = opacStart; i >= opacEnd; i--) { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } else if(opacStart < opacEnd) { 
        for(i = opacStart; i <= opacEnd; i++) 
            { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } 
} 

//change the opacity for different browsers 
function changeOpac(opacity, id) { 
    var object = document.getElementById(id).style; 
    object.opacity = (opacity / 100); 
    object.MozOpacity = (opacity / 100); 
    object.KhtmlOpacity = (opacity / 100); 
    object.filter = "alpha(opacity=" + opacity + ")"; 
} 


function kiemelt(id){

	for (u=1;u<=10;u++){
		if(("kk"+u)==("kk"+id)){
			if(document.getElementById("kk"+u)) document.getElementById("kk"+u).style.display = 'block';
			}
		else {
			if(document.getElementById("kk"+u)) document.getElementById("kk"+u).style.display = 'none';
			}
		
		
		
		}// for vege
	
	}