function affich_menu(div){
	cache_menu(div);
	if(document.getElementById(div).style.display=='none'){
		new Effect.BlindDown(div, { duration: 0.8 });
	}else{	
		new Effect.BlindUp(div, { duration: 0.8 });
	}
}

function cache_menu(div){
	if(document.getElementById('Q1') && document.getElementById('Q1').style.display!='none' && div!='Q1'){
		new Effect.BlindUp('Q1', { duration: 0.8 });
	}
	if(document.getElementById('Q2') && document.getElementById('Q2').style.display!='none' && div!='Q2'){
		new Effect.BlindUp('Q2', { duration: 0.8 });
	}
	if(document.getElementById('Q3') && document.getElementById('Q3').style.display!='none' && div!='Q3'){
		new Effect.BlindUp('Q3', { duration: 0.8 });
	}
	if(document.getElementById('Q4') && document.getElementById('Q4').style.display!='none' && div!='Q4'){
		new Effect.BlindUp('Q4', { duration: 0.8 });
	}
	if(document.getElementById('Q5') && document.getElementById('Q5').style.display!='none' && div!='Q5'){
		new Effect.BlindUp('Q5', { duration: 0.8 });
	}
	if(document.getElementById('Q6') && document.getElementById('Q6').style.display!='none' && div!='Q6'){
		new Effect.BlindUp('Q6', { duration: 0.8 });
	}
	if(document.getElementById('Q7') && document.getElementById('Q7').style.display!='none' && div!='Q7'){
		new Effect.BlindUp('Q7', { duration: 0.8 });
	}
	if(document.getElementById('Q8') && document.getElementById('Q8').style.display!='none' && div!='Q8'){
		new Effect.BlindUp('Q8', { duration: 0.8 });
	}
	if(document.getElementById('Q9') && document.getElementById('Q9').style.display!='none' && div!='Q9'){
		new Effect.BlindUp('Q9', { duration: 0.8 });
	}
	if(document.getElementById('Q10') && document.getElementById('Q10').style.display!='none' && div!='Q10'){
		new Effect.BlindUp('Q10', { duration: 0.8 });
	}
	if(document.getElementById('Q11') && document.getElementById('Q11').style.display!='none' && div!='Q11'){
		new Effect.BlindUp('Q11', { duration: 0.8 });
	}
	if(document.getElementById('Q12') && document.getElementById('Q12').style.display!='none' && div!='Q12'){
		new Effect.BlindUp('Q12', { duration: 0.8 });
	}
	if(document.getElementById('Q13') && document.getElementById('Q13').style.display!='none' && div!='Q13'){
		new Effect.BlindUp('Q13', { duration: 0.8 });
	}
	if(document.getElementById('Q14') && document.getElementById('Q14').style.display!='none' && div!='Q14'){
		new Effect.BlindUp('Q14', { duration: 0.8 });
	}
	if(document.getElementById('Q15') && document.getElementById('Q15').style.display!='none' && div!='Q15'){
		new Effect.BlindUp('Q15', { duration: 0.8 });
	}
	if(document.getElementById('Q16') && document.getElementById('Q16').style.display!='none' && div!='Q16'){
		new Effect.BlindUp('Q16', { duration: 0.8 });
	}
	if(document.getElementById('Q17') && document.getElementById('Q17').style.display!='none' && div!='Q17'){
		new Effect.BlindUp('Q17', { duration: 0.8 });
	}
	if(document.getElementById('Q18') && document.getElementById('Q18').style.display!='none' && div!='Q18'){
		new Effect.BlindUp('Q18', { duration: 0.8 });
	}
	if(document.getElementById('Q19') && document.getElementById('Q19').style.display!='none' && div!='Q19'){
		new Effect.BlindUp('Q19', { duration: 0.8 });
	}
	if(document.getElementById('Q20') && document.getElementById('Q20').style.display!='none' && div!='Q20'){
		new Effect.BlindUp('Q20', { duration: 0.8 });
	}	
	if(document.getElementById('metal') && document.getElementById('metal').style.display!='none' && div!='metal'){
		new Effect.BlindUp('metal', { duration: 0.8 });
	}	
	if(document.getElementById('bois') && document.getElementById('bois').style.display!='none' && div!='bois'){
		new Effect.BlindUp('bois', { duration: 0.8 });
	}	
	if(document.getElementById('plastique') && document.getElementById('plastique').style.display!='none' && div!='plastique'){
		new Effect.BlindUp('plastique', { duration: 0.8 });
	}	
	if(document.getElementById('beton') && document.getElementById('beton').style.display!='none' && div!='beton'){
		new Effect.BlindUp('beton', { duration: 0.8 });
	}	
	if(document.getElementById('pierre') && document.getElementById('pierre').style.display!='none' && div!='pierre'){
		new Effect.BlindUp('pierre', { duration: 0.8 });
	}
	if(document.getElementById('brique') && document.getElementById('brique').style.display!='none' && div!='brique'){
		new Effect.BlindUp('brique', { duration: 0.8 });
	}
	if(document.getElementById('enduit') && document.getElementById('enduit').style.display!='none' && div!='enduit'){
		new Effect.BlindUp('enduit', { duration: 0.8 });
	}
}

/*---------------------------------------------------------------------------------*/

function montre_video(num) { 
	if(document.getElementById('Layer_video'+num)){
		document.getElementById('Layer_video'+num).style.visibility='visible';
	}
} 

// ----------------------------- 

function cache_video(num) { 
	if(document.getElementById('Layer_video'+num)){
		document.getElementById('Layer_video'+num).style.visibility='hidden';
	}
}