function toggleFlap(me1_1, me1_2, me2_1, me2_2, me3_1, me3_2, me4_1, me4_2)
{    
    me1_22 = document.getElementById(me1_2);
    
    me2_11 = document.getElementById(me2_1);
    me2_22 = document.getElementById(me2_2);
    me3_11 = document.getElementById(me3_1);
    me3_22 = document.getElementById(me3_2);
    me4_11 = document.getElementById(me4_1);
    me4_22 = document.getElementById(me4_2);


    me1_1.style.display = 'none';
    me1_22.style.display='block';
    
    me2_22.style.display = 'none';
    me2_11.style.display='block';
    
    me3_22.style.display = 'none';
    me3_11.style.display='block';
	
    me4_22.style.display = 'none';
    me4_11.style.display='block';
}