function mutat(id){
		switch (id)
			{
				case 1:
					document.getElementById('elso_ugro').style.display = 'block';
					document.getElementById('masodik_ugro').style.display = 'none';
					document.getElementById('harmadik_ugro').style.display = 'none';
					break;
				case 2:
					document.getElementById('elso_ugro').style.display = 'none';
					document.getElementById('masodik_ugro').style.display = 'block';
					document.getElementById('harmadik_ugro').style.display = 'none';
					break;
				case 3:
					document.getElementById('elso_ugro').style.display = 'none';
					document.getElementById('masodik_ugro').style.display = 'none';
					document.getElementById('harmadik_ugro').style.display = 'block';
					break;
			}

	}
	function getPageSize(){
		var xScroll, yScroll;
			
		if (window.innerHeight && window.scrollMaxY) {	
			xScroll = document.body.scrollWidth;
			yScroll = window.innerHeight + window.scrollMaxY;
		} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
			xScroll = document.body.scrollWidth;
			yScroll = document.body.scrollHeight;
		} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
			xScroll = document.body.offsetWidth;
			yScroll = document.body.offsetHeight;
		}
						
		var windowWidth, windowHeight;
		if (self.innerHeight) {	// all except Explorer
			windowWidth = self.innerWidth;
			windowHeight = self.innerHeight;
		} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
			windowWidth = document.documentElement.clientWidth;
			windowHeight = document.documentElement.clientHeight;
		} else if (document.body) { // other Explorers
			windowWidth = document.body.clientWidth;
			windowHeight = document.body.clientHeight;
		}	
		
		// for small pages with total height less then height of the viewport
		if(yScroll < windowHeight){
			pageHeight = windowHeight;
		} else { 
			pageHeight = yScroll;
		}
	
		// for small pages with total width less then width of the viewport
		if(xScroll < windowWidth){	
			pageWidth = windowWidth;
		} else {
			pageWidth = xScroll;
		}
	
	
		arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
		return arrayPageSize;
	}
	function elrejt(mit,db) {
		for (i=0;i<8;i++) {
			document.getElementById('lebego_'+i).style.display = 'none';
		}
	}

	function megjelenit(mit,db,melyik) {
		for (i=0;i<db;i++) {
				document.getElementById('lebego_'+i).style.display = 'none';
		}

		menuk = new Array();
		menuk[0] = 52;
		menuk[1] = 221;
		menuk[2] = 330;
		menuk[3] = 455;
		menuk[4] = 589;
		menuk[5] = 714;
		menuk[6] = 810;
		menuk[7] = 810;
		
				
		if (document.getElementById('lebego_'+mit).style.display == 'none') {
			document.getElementById('lebego_'+mit).style.display = 'block';
			var pagearray = getPageSize();
			if ((pagearray[2]-900) > 0) {
				if (document.all) {
					document.getElementById('lebego_'+mit).style.left = Math.round((pagearray[2])/2) - 501 + menuk[mit] + "px";
					document.getElementById('lebego_'+mit).style.top = "331px";
				} else {
					document.getElementById('lebego_'+mit).style.left = Math.round((pagearray[2])/2) - 509 + menuk[mit] + "px";
					document.getElementById('lebego_'+mit).style.top = "331px";
				}
			}
		} else {
			document.getElementById('lebego_'+mit).style.display = 'none';
		}
	}