function submenu(){
	/** submenu abre **/
	document.getElementById("contato_sub").onmouseover = function(){
		document.getElementById("sub").style.display = 'block';
	}; 
	document.getElementById("sub").onmouseover = function(){
		document.getElementById("sub").style.display = 'block';
	}; 
	/** submenu fecha **/
	document.getElementById("contato_sub").onmouseout = function(){
		document.getElementById("sub").style.display = 'none';
	}; 
	document.getElementById("sub").onmouseout = function(){
		document.getElementById("sub").style.display = 'none';
	};
}
window.onload=submenu;