function change_quadro (x) {
	if (x == 'video-alta') {
		if (document.fVideo && document.fVideo.chgVelocidade) 
			document.fVideo.chgVelocidade('alta');
	} else if (x == 'video-baixa') {
		if (document.fVideo && document.fVideo.chgVelocidade) 
			document.fVideo.chgVelocidade('baixa');
	}
	if (x == 'chat') {
		showHide('quadromsg', false);
		showHide('quadroinfo', false);
		showHide('quadrodocs', false);
		showHide('quadrochat', true);
	} else if (x == 'mensagem') {
		showHide('quadroinfo', false);
		showHide('quadrochat', false);
		showHide('quadrodocs', false);
		showHide('quadromsg', true);
	} else if (x == 'info') {
		showHide('quadrochat', false);
		showHide('quadromsg', false);
		showHide('quadrodocs', false);
		showHide('quadroinfo', true);
	} else if (x == 'docs') {
		showHide('quadrochat', false);
		showHide('quadromsg', false);
		showHide('quadroinfo', false);
		showHide('quadrodocs', true);
	}
	if (x == 'enquete') {
		showHide('quadroslide', false);
		showHide('quadroslidelista', false);
		showHide('quadroenquete', true);
		//showHide('img_slide', true);
		//showHide('img_slide_lista', true);
		//showHide('img_enquete', false);
	} else if (x == 'slide') {
		showHide('quadroslidelista', false);
		showHide('quadroenquete', false);
		showHide('quadroslide', true);
		//showHide('img_slide_lista', true);
		//showHide('img_enquete', true);
		//showHide('img_slide', false);
	} else if (x == 'slide_lista') {
		showHide('quadroslide', false);
		showHide('quadroenquete', false);
		showHide('quadroslidelista', true);
		//showHide('img_slide', true);
		//showHide('img_enquete', true);
		//showHide('img_slide_lista', false);
	}
	if (x == 'chat2') {
		showHide('quadroslide2', false);
		showHide('quadrochat2', true);
	} else if (x == 'slide2') {
		if (window.fChat && window.fChat.sendmsg && window.fChat.sendmsg.toHide)
			window.fChat.sendmsg.toHide();
		showHide('quadrochat2', false);
		showHide('quadroslide2', true);
	}
}

function getElement (name) {
	var f = null;
	if (document.all)
		f = document.all(name);
	else if (document.getElementById)
		f = document.getElementById(name);
	return f;
}

function showHide (name, toShow) {
	var x = getElement(name);
	if (! x) return;
	x.style.display = (toShow ? '' : 'none');
}

function expande_slide (slide) {
	var popupw = window.open('pSlide.asp?slide=' + escape(slide), 'slide_itv_expandido', 'top=32,left=16,width=732,height=600,scrollbars=1');
	popupw.focus();
}

function disable_right_click () {
	document.oncontextmenu = function () { return false; };
	if (document.layers) {
		window.captureEvents(Event.MOUSEDOWN);
		window.onmousedown = function (e) { if (e.target == document) { return false; } };
	} else {
		document.onmousedown = function () { return false; };
	}
}

function lupa_position () {
	var slide_w, slide_h;
	var ico_w, ico_h;
	var frame_w, frame_h;
	var f;

	f = getElement('img_slide');
	if (! f) return;
	slide_w = f.width;
	slide_h = f.height;

	/*
	if (! document.all) return;
	frame_w = document.body.clientWidth;
	frame_h = document.body.clientHeight;
	*/

	f = getElement('img_lupa');
	if (! f) return;
	f.style.display = '';
	
	ico_w = f.width;
	ico_h = f.height;
	f.style.left = slide_w - ico_w - 3;
	f.style.top = slide_h - ico_h - 3;
}

function url_load_frame (sta_var, fra_name, url) {
	if (eval(sta_var)) return;

	var xmlHttp;
	try {  // Firefox, Opera 8.0+, Safari  
		xmlHttp = new XMLHttpRequest();
	} catch (e) {  // Internet Explorer  
		try {
			xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); 
			} catch (e) {
				//alert("Your browser does not support AJAX!");
				return false;
			}
		}    
	}  
	xmlHttp.onreadystatechange = function() {
		if(xmlHttp.readyState == 4) {
			eval(sta_var + ' = false');
			var fradoc = eval(fra_name + '.document');
			fradoc.open();
			fradoc.write(xmlHttp.responseText);
			fradoc.close();
		}
	}
	xmlHttp.open("GET", url, true);
	eval(sta_var + ' = true');
	xmlHttp.send(null);
}