var b_op = new Array;
var b_on = new Array;
var timer = 30;
var coef = 0.1;

function fadeInStart(num) {
	if(typeof b_op[num] == "undefined") {
		b_op[num] = 0;
	}
	b_on[num] = 1;
	setTimeout("fadeIn('"+num+"')",timer);
}

function fadeIn(num) {
	if(b_op[num] < 1 && b_on[num]) {

		b_op[num] = b_op[num] + coef;
		var element = document.getElementById('icon_item'+num+'_o');
		setOpacity(element,b_op[num]);
		setTimeout("fadeIn('"+num+"')",timer);
	} else {
		var element = document.getElementById('icon_item'+num+'_o');
		setOpacity(element,1);
	}
}

function fadeOutStart(num) {
	b_on[num] = 0;
	setTimeout("fadeOut('"+num+"')",timer);
}

function fadeOut(num) {
	if(b_op[num] > 0 && !b_on[num]) {
		b_op[num] = b_op[num] - coef;
		var element = document.getElementById('icon_item'+num+'_o');
		setOpacity(element,b_op[num]);
		setTimeout("fadeOut('"+num+"')",timer);
	} else {
		var element = document.getElementById('icon_item'+num+'_o');
		setOpacity(element,0);
	}
}

function setOpacity(element,op) {
	element.style.opacity = op;
	element.style.mozOpacity = op;
	element.style.filter = 'alpha(opacity='+op*100+')';
}