var onn = 'email';

function toggleOnOff( toOn, toOff )
{
	var goingOn = document.getElementById( toOn );
	var goingOff = document.getElementById( toOff );
	onn = toOn;
	
	goingOn.disabled = "";
	goingOn.enabled = "enabled";
	goingOff.disabled = "disabled";
	goingOff.enabled = "";
	goingOff.value = "";
	
	document.getElementById('submit').disabled = "disabled";
}


function enableSubmit()
{	
	var canUnlock = 1;
	
	/* Nome */
	var theElement = document.getElementById('nome').value;
	theElement = theElement.replace(/ /g, "");
	if(theElement == "")
	{
		canUnlock = 0;
	}
	
	/* telefone */
	if(onn == 'telefone')
	{
		theElement = document.getElementById('telefone').value;
		theElement = theElement.replace(/ /g, "");
		if(theElement == "")
		{
			canUnlock = 0;
		}
	}
	
	/* e-mail */
	if(onn == 'email')
	{
		theElement = document.getElementById('email').value;
		theElement = theElement.replace(/ /g, "");
		if(theElement == "")
		{
			canUnlock = 0;
		}
	}
	
	theElement = document.getElementById('assunto').value;
	theElement = theElement.replace(/ /g, "");
	if(theElement == "")
	{
		canUnlock = 0;
	}
	
	if(canUnlock == 1)
	{
		document.getElementById('submit').disabled = "";
	}	
	else
	{
		document.getElementById('submit').disabled = "disabled";
	}
	
}

document.onkeydown = function() {
	var hf;
			
		if (document.activeElement){
			hf = document.activeElement
		}
		else {
			hf = document.focusNode;
		}
			
	if(event.keyCode == 13) {	
		
		if (hf.id == 'assunto')
		{
			return true;
		}
		return false;
	}
}