function getPosElemento(elemID){
    var offsetTrail = document.getElementById(elemID);
    var offsetLeft = 0;
    var offsetTop = 0;
    while (offsetTrail) {
        offsetLeft += offsetTrail.offsetLeft;
        offsetTop += offsetTrail.offsetTop;
        offsetTrail = offsetTrail.offsetParent;
    }
    if (navigator.userAgent.indexOf("Mac") != -1 && 
        typeof document.body.leftMargin != "undefined") {
        offsetLeft += document.body.leftMargin;
        offsetTop += document.body.topMargin;
    }
    return {left:offsetLeft, top:offsetTop};
}

function fecha(){
	new Effect.BlindUp($('div_slide'));
}
	
function abre(){

	var retorno = new Ajax.Updater('div_slide', espaco + 'phpAjax/slideSacola.php', {method: 'post'});
	var esq = getPosElemento("sacola").left;
	var top = getPosElemento("sacola").top;
	
	$('div_slide').style.top = top + 25;
	$('div_slide').style.left = esq ;
	
	new Effect.BlindDown($('div_slide'));
}