/*
 * autor: Ciro Feitosa - http://cirofeitosa.com.br
 * maio/2007
 */

abreJanela = function(url)
{
	var no=Math.random()*10;
	window.open(url, Math.round(no), "width=760,height=500,toobar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes");
}

function abreModal(i)
{
	$("modalGrade").style.display="block";
	$(i).style.display="block";

	var altTela = Math.floor(document.body.offsetHeight);
	var largTela =  Math.floor(document.body.offsetWidth);
	var largDiv = Math.floor($(i).offsetWidth);
	var altDiv = Math.floor($(i).offsetHeight);

	$("modalGrade").style.height=((altTela+altDiv) - (400)) +"px";
	$("modalGrade").style.width="100%";
	$(i).style.left=((largTela/2)-(largDiv/2))+"px";

	var vScrollY = 0;

	if (document.all)
	{
		if (!document.documentElement.scrollTop)
			vScrollY = document.body.scrollTop;
		else
			vScrollY = document.documentElement.scrollTop;
	}   
	else
	{
		vScrollY = window.pageYOffset;
	}

	$(i).style.top=((screen.availHeight/2) + vScrollY - (altDiv/2))+"px";
	if (parseInt($(i).style.top) < 0)
	{
		$(i).style.top = '0px';
	}
}

function fechaModal(i)
{
	$("modalGrade").style.display="none";
	$(i).style.display="none";
}