/* http://jrm.cc/
*/
var exec = new Array();
var dir  = new Array();

function startExpand(target, expandTo, speed){

	//alert(target +":"+ exec[target] +":"+ dir[target]);

	if(!exec[target])
		exec[target] = 0;

	if(!dir[target])
		dir[target] = 'open';

	if(dir[target] == 'open') {
	
		exec[target] = exec[target] + speed;
		if(exec[target] < expandTo) {
			document.getElementById(target).style.height = (exec[target]) + "px";
			setTimeout("startExpand('" + target + "'," + expandTo + "," + speed + ")",1);
		} else {
			document.getElementById(target).style.height = (expandTo) + "px";
			dir[target] = 'close';
		}
		
	} else {
	
		exec[target] = exec[target] - (speed*2);
		if(exec[target] > 0) {
			document.getElementById(target).style.height = (exec[target]) + "px";
			setTimeout("startExpand('" + target + "'," + expandTo + "," + speed + ")",1);
		} else {
			document.getElementById(target).style.height = "0px";
			dir[target] = 'open';
		}
	
	}
}


//var so_target;
var so_interval;

function slide(target, expandTo, speed) {
	var intv_call = 'slideIt(\'' + target + '\',' + expandTo + ')';
	clearInterval(so_interval);
	so_interval = setInterval(intv_call,speed);
}
function masquer( quoi ) {
	document.getElementById(quoi).style.overflow = 'hidden';
	document.getElementById(quoi).style.height = '0px';
}

function slideIt(target, expandTo) {
	
	var current = document.getElementById(target).offsetHeight;
	distTo = Math.abs(current - expandTo);
	
	var goSize = distTo/4;
	if( goSize < 1 ) goSize = 1;
	
	if( current > expandTo ) {
		//make shorter
		document.getElementById(target).style.height = (current-goSize) + "px";
	} else {
		// make taller
		document.getElementById(target).style.height = (current+goSize) + "px";
	}
	
	if( distTo < 2 ) {
		// very close, kill the timer, set it to the right height
		document.getElementById(target).style.height = expandTo + "px";
		clearInterval(so_interval);
	}
	
	//alert(distTo +":"+ goSize);
	
}

function stageCfppa1() {
	slide('calque1',350,30); masquer('calque2'); masquer('calque3'); masquer('calque4'); masquer('calque5');
}
function stageCfppa2() {
	slide('calque2',466,30); masquer('calque1'); masquer('calque3'); masquer('calque4'); masquer('calque5');
}
function stageCfppa3() {
	slide('calque3',646,30); masquer('calque1'); masquer('calque2'); masquer('calque4'); masquer('calque5');
}
function stageCfppa4() {
	slide('calque4',200,30); masquer('calque1'); masquer('calque2'); masquer('calque3'); masquer('calque5');
}
function stageCfppa5() {
	slide('calque5',475,30); masquer('calque1'); masquer('calque2'); masquer('calque3'); masquer('calque4');
}