// JavaScript Document

function showhide(obj) {
	var el = document.getElementById(obj);
	if(el){
		if ( el.style.display!= 'none' ) {
			el.style.display = 'none';
		} else {
				el.style.display = '';
		}
	}
}


function initslides(pN){
	var n = document.getElementById('slidenext');
	n.style.display = "";
	var p = document.getElementById('slideprev');
	p.style.display = "";
	
	for(i=1; i<=pN-1; i++){
		document.getElementById('slide-'+i).style.display = "none";
		fade('slide-'+i, 100, 0, 0);
	}
	
}


function slidemove(p){
	
	// find which slide is being displayed
	var currslide = 0;
	
	var i = 0;
	do
	{   x = document.getElementById('slide-'+i);
		if(x){
			//alert(x.style.display);
			if(x.style.display=="" || x.style.display=="block"){
				currslide = i;
			}
		}else{
			break;
		}
		i++;
	}while(true);
	
	var minslide = 0;
	var maxslide = i-1;
	
	fade('slide-'+currslide, 100, 0, 500);
	hide('slide-'+currslide);

	// find next or prev
	switch(p){
		case 'prev':
			if(currslide==0){
				currslide = maxslide;
			}else{
				currslide--;
			}
		break;
		case 'next':
			if(currslide>=maxslide){
				currslide = 0;
			}else{
				currslide++;
			}
		break;
	}

	show('slide-'+currslide);
	fade('slide-'+currslide, 0, 100, 500);


	}
	


function showhidebooks(pMenuValue){



if(pMenuValue==11){

for(i=1;i<=66;i++){
	document.getElementById("b" + i).disabled = false
	document.getElementById("lab" + i).style.color = "black"
}
}else{
for(i=1;i<=66;i++){
	document.getElementById("b" + i).disabled = true
	document.getElementById("lab" + i).style.color = "#bbbbbb"
}
}
}