function changeTrendy(variable,val){
	
	if(variable=='druh'){
		if(val>=1 && val<=2){
			document.getElementById('izby').style.display="block";	
		}else{
			document.getElementById('izby').style.display="none";	
		}
	}else if(variable=='druh1'){
		if(val>=1 && val<=2){
			document.getElementById('izby1').style.display="block";	
		}else{
			document.getElementById('izby1').style.display="none";	
		}
	}

}

function porovnaj(num){
	
	Effect.toggle('compare'+num,'appear',{duration:0.8});
	if(document.getElementById('comp'+num).value==0){
		document.getElementById('comp'+num).value=1;
		document.getElementById("porovnatBar").className="porovnat_up";
	}else{
		document.getElementById('comp'+num).value=0;
		document.getElementById("porovnatBar").className="porovnat_down";
	}
}