function pegarPosicaoY(objeto){
    var atual_top = 0;
    if (objeto.offsetParent) {
        while (objeto.offsetParent) {
            atual_top += objeto.offsetTop
            objeto = objeto.offsetParent;
        }
    }
	return atual_top;
}
function pegarPosicaoX(objeto){
    var atual_left = 0;
    if (objeto.offsetParent) {
        while (objeto.offsetParent){
            atual_left += objeto.offsetLeft
            objeto = objeto.offsetParent;
        }
    }
    return atual_left;
}
function ampliar(foto, elemento){
	heg = pegarPosicaoY(document.getElementById(elemento));
	lef = pegarPosicaoX(document.getElementById('colmovel'));
	var arrayPageSize = getPageSize();
	ajax(foto, 'galeria', false);
	//document.getElementById('galeria').style.top     = (heg-170)+'px';
	//document.getElementById('galeria').style.left    = (lef+130)+'px';
	document.getElementById('galeria').style.display = 'block';
	document.getElementById('tampa').style.display   ='block';
	document.getElementById('tampa').style.height    = pageHeight+'px';
}

function getPageSize(){
	var xScroll, yScroll;
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}
function closeAmplia(){
	document.getElementById('galeria').innerHTML     ='';
	document.getElementById('galeria').style.display ='none';
	document.getElementById('tampa').style.display   ='none';
}