//------------------------------FUNÇÕES PARA CONTROLE DE OPACIDADE---------------------------------------------

function opacity(id, opacStart, opacEnd, millisec) 
{ 
	//speed for each frame 
	var speed = Math.round(millisec / 100); 
	var timer = 0; 
	//determine the direction for the blending, if start and end are the same nothing happens 
	if(opacStart > opacEnd) 
	{ 
		for(i = opacStart; i >= opacEnd; i--) 
		{ 
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
			timer++; 
		}
	} 
	else if(opacStart < opacEnd) 
	{ 
		for(i = opacStart; i <= opacEnd; i++) 
		{ 
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
			timer++; 
		} 
	} 
} 

//change the opacity for different browsers 
function changeOpac(opacity, id) 
{ 
	var object = document.getElementById(id).style; 
	object.opacity = (opacity / 100); 
	object.MozOpacity = (opacity / 100); 
	object.KhtmlOpacity = (opacity / 100); 
	object.filter = "alpha(opacity=" + opacity + ")"; 
	//Occults the module <<<<<<
	if(opacity < 1)
	{
		document.getElementById(id).style.display='none';
	}
	else
	{
		document.getElementById(id).style.display='inline';
		if(id == 'area_conteudo')
		{
			if(opacity > 99)
			{
				descarrega_logotipos();
			}
		}
	}
}