function validaContato()
{
	var nome = document.getElementById( 'nome' );
	var email = document.getElementById( 'email' );
	var mensagem = document.getElementById( 'mensagem' );
	var codigo = document.getElementById( 'codigo' );
	
	if( !nome.value )
	{
		alert( 'Preencha o campo NOME' );	
		nome.focus();
		return false;
	}
	
	if( !email.value )
	{
		alert( 'Preencha o campo E-MAIL' );	
		email.focus();
		return false;
	}
	
	if( !mensagem.value )
	{
		alert( 'Preencha o campo MENSAGEM' );	
		mensagem.focus();
		return false;
	}
	
	if( !codigo.value )
	{
		alert( 'Preencha o campo CONFIRMACAO' );	
		codigo.focus();
		return false;
	}	
}

function validaCadastro()
{

	var nome = document.getElementById( 'nome' );
	var email = document.getElementById( 'email' );
	
	if( !nome.value )
	{
		alert( 'Preencha o campo NOME' );	
		nome.focus();
		return false;
	}
	
	if( !email.value )
	{
		alert( 'Preencha o campo E-MAIL' );	
		email.focus();
		return false;
	}

}

function popUp( url , tipo ) 
{
	if( tipo == 1 )
	{
		w = 400;
		h = 530;
		window.open( url , 'popup' , 'width='+w+',height='+h );
	}
	else if( tipo == 2 )
	{
		w = 600;
		h = 530;
		window.open( url , 'popup' , 'scrollbars=yes,width='+w+',height='+h );
	}
	else if( tipo == 5 )
	{
		w = 548;
		h = 500;
		window.open( url , 'popup' , 'width='+w+',height='+h );
	}	
	else
	{
		w = 635;
		h = 600;
		window.open( url , 'popup' , 'width='+w+',height='+h );
	}	
	
}


var baseopacity=30

function slowhigh(which2){
imgobj=which2
browserdetect=which2.filters? "ie" : typeof which2.style.MozOpacity=="string"? "mozilla" : ""
instantset(baseopacity)
highlighting=setInterval("gradualfade(imgobj)",50)
}

function slowlow(which2){
cleartimer()
instantset(baseopacity)
}

function instantset(degree){
if (browserdetect=="mozilla")
imgobj.style.MozOpacity=degree/100
else if (browserdetect=="ie")
imgobj.filters.alpha.opacity=degree
}

function cleartimer(){
if (window.highlighting) clearInterval(highlighting)
}

function gradualfade(cur2){
if (browserdetect=="mozilla" && cur2.style.MozOpacity<1)
cur2.style.MozOpacity=Math.min(parseFloat(cur2.style.MozOpacity)+0.1, 0.99)
else if (browserdetect=="ie" && cur2.filters.alpha.opacity<100)
cur2.filters.alpha.opacity+=10
else if (window.highlighting)
clearInterval(highlighting)
}