function horizontal() 
{ 
   var navItems = document.getElementById("barra").getElementsByTagName("li"); 
    
   for (var i=0; i< navItems.length; i++) 
   { 
      if((navItems[i].className == "menuvertical") || (navItems[i].className == "submenu")) 
      { 
         if(navItems[i].getElementsByTagName('ul')[0] != null) 
         { 
            navItems[i].onmouseover=function() {this.getElementsByTagName('ul')[0].style.display="block";this.style.backgroundColor = "#f9f9f9";} 
            navItems[i].onmouseout=function() {this.getElementsByTagName('ul')[0].style.display="none";this.style.backgroundColor = "#FFFFFF";} 
         } 
      } 
   } 
} 

function validaForm(formulario)
{
	for (var i=0; i < document.getElementById(formulario).length; i++)
  	{
  		if (document.getElementById(formulario).elements[i].value == "")
  		{
			if (document.getElementById(formulario).elements[i].className == "inputTextRequerido")
			{
     		alert("O campo " + document.getElementById(formulario).elements[i].name + " deve ser preenchido!");  
			return false;	
			}
	 	}	 
  	}  			
	return true;
}