function ExibirFlutuante(elementid){

    var arrayPageSize = getPageSize();
    
    var element = document.getElementById(elementid);
    
    element.style.width = arrayPageSize[0] + 'px';
    element.style.height = arrayPageSize[1] + 'px';
	
    
    
}





function ShowHide(elementid){
    var element = document.getElementById(elementid);
    if (element.style.visibility == "hidden") {
        element.style.visibility = "visible";
    } else {
        element.style.visibility = "hidden";
    }
}





function getPageSize(){

    var xScroll, yScroll;
    
    if (window.innerHeight && window.scrollMaxY) {
        xScroll = window.innerWidth + window.scrollMaxX;
        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
        if (document.documentElement.clientWidth) {
            windowWidth = document.documentElement.clientWidth;
        } else {
            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 = xScroll;
    } else {
        pageWidth = windowWidth;
    }
    
    return [pageWidth, pageHeight];
}





// Valida formulário de fale conosco
function ValidaFale(){
    if (document.fale.nome.value == "") {
        window.alert("Por favor, preencha o campo nome!");
        document.fale.nome.focus();
        return false;
    }
    if (document.fale.email.value == "") {
        window.alert("Por favor, preencha o campo e-mail!");
        document.fale.email.focus();
        return false;
    }
    if (document.fale.email.value.indexOf("@") == -1 || document.fale.email.value.indexOf(".") == -1) {
        window.alert("O e-mail digitado é invalido");
        document.fale.email.focus();
        return false;
    }
    if (document.fale.comentarios.value == "") {
        window.alert("Por favor, preencha o campo comentarios!");
        document.fale.comentarios.focus();
        return false;
    }
}