function show_player(){
	if(player_status == false){
		$("player").show();
		$("player_btn").addClassName('selected');	
		player_status = true;
	}else if(player_status == true){
		$("player").hide();
		$("player_btn").removeClassName('selected');	
		player_status = false;
	}	
}

function show_login(){
	$("login-box").show();
	$("login_btn").addClassName('selected');
}

function hide_login(){
	$("login-box").hide();
	$("login_btn").removeClassName('selected');
}

function showProjOver(id){
	nome = "content-box-"+ id;
	$(nome).addClassName('selected');
}

function hideProjOver(id){
	nome = "content-box-"+ id;
	$(nome).removeClassName('selected');
}

function move_slider(who, dir, step, limit){
	if(dir == 1){
		left_atual += step;
	}else if(dir == -1){
		left_atual -= step;
	}
	if(left_atual > -5){
		left_atual = -5;
	}
	if(left_atual < limit){
		left_atual = limit;
	}
	new Effect.Move($(who), { 
		x: left_atual, y: 0, 
		mode: 'absolute', 
		duration: 0.3,
		transition: Effect.Transitions.sinoidal
	});				
	return false;
}
/*
function setup_project_slider(){
	h = 0;
	quantos_projetos = <%= @projects.size %>;
	for(x=0; x<quantos_projetos; x++){
		nome = 'project-'+ x;
		hh = $(nome).getHeight();
		if(hh > h){
			h = hh;
		}
	}
	$("project_slider").setStyle({
	  height: h+'px'
	});				
}
*/
function mailcheck(str) {
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
		return false
	}
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		return false
	}
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		return false
	}
	if (str.indexOf(at,(lat+1))!=-1){
    	return false
	}
	if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		return false
	}
	if (str.indexOf(dot,(lat+2))==-1){
		return false
	}
	if (str.indexOf(" ")!=-1){
		return false
	}
	return true					
}