function menuDropDown(tema) {
   moz = !(document.all); 
   nav = navigator.appName; 
   temas(tema);  
   if(moz || nav == 'Opera') {
       document.styleSheets[0].cssRules[2].style.backgroundColor = cor_Menu_NaoAtiva; 
       document.styleSheets[0].cssRules[4].style.color = cor_Fonte_Menu_NaoAtiva;    
       document.styleSheets[0].cssRules[5].style.backgroundColor = cor_Submenu_NaoAtiva;    
       document.styleSheets[0].cssRules[7].style.color = cor_Fonte_Submenu_NaoAtiva;
       document.styleSheets[0].cssRules[9].style.backgroundColor = cor_Submenu_NaoAtiva;       
       document.styleSheets[0].cssRules[10].style.color = cor_Fonte_Submenu_NaoAtiva;;
   }
   else {
       document.styleSheets[0].rules[2].style.backgroundColor = cor_Menu_NaoAtiva; 
       document.styleSheets[0].rules[4].style.color = cor_Fonte_Menu_NaoAtiva;    
       document.styleSheets[0].rules[5].style.backgroundColor = cor_Submenu_NaoAtiva;    
       document.styleSheets[0].rules[7].style.color = cor_Fonte_Submenu_NaoAtiva;
       document.styleSheets[0].rules[9].style.backgroundColor = cor_Submenu_NaoAtiva;       
       document.styleSheets[0].rules[10].style.color = cor_Fonte_Submenu_NaoAtiva;;
   }
   var navItems = document.getElementById("menu_dropdown").getElementsByTagName("li"); 
   var links = document.getElementById("menu_dropdown").getElementsByTagName("a"); 
   for (var i=0; i< navItems.length; i++) {  
      if(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 = cor_Menu_Ativa;}
            navItems[i].onmouseout=function() {this.getElementsByTagName('ul')[0].style.display="none";this.style.backgroundColor = cor_Menu_NaoAtiva;}
			links[i].onmouseover=function() {this.style.color = cor_Fonte_Menu_Ativa;}
		    links[i].onmouseout=function() {this.style.color = cor_Fonte_Menu_NaoAtiva;}			
         } 
      } 
      if(navItems[i].className == "item") {
         navItems[i].onmouseover=function() {this.style.backgroundColor = cor_Submenu_Ativa;}
         navItems[i].onmouseout=function() {this.style.backgroundColor = cor_Submenu_NaoAtiva;}

         links[i].onmouseover=function() {this.style.color = cor_Fonte_Submenu_Ativa;}
		 links[i].onmouseout=function() {this.style.color = cor_Fonte_Submenu_NaoAtiva;}		  
      }
   }
} 
function temas(tema) {
  switch(tema) {
       case 12 : // menu_xp
		   cor_Menu_Ativa = '#CCCCCC';
		   cor_Menu_NaoAtiva = '#D3E5FA'; 
		   cor_Fonte_Menu_Ativa = '#000000';
		   cor_Fonte_Menu_NaoAtiva = '#0A246A';
		   cor_Submenu_Ativa = '#1665CB';
		   cor_Submenu_NaoAtiva = '#FFFFFF';
		   cor_Fonte_Submenu_Ativa = '#FFFFFF';
		   cor_Fonte_Submenu_NaoAtiva = '#000000';
           if(moz || nav == 'Opera') {
               document.styleSheets[0].cssRules[2].style.border = 'none'; 
               document.styleSheets[0].cssRules[5].style.border = '1px solid #55A1FF'; 	 
               document.styleSheets[0].cssRules[7].style.border = 'none'; 	  		   
               document.styleSheets[0].cssRules[10].style.border = 'none'; 	  		   
		   }
		   else {
               document.styleSheets[0].rules[2].style.border = 'none'; 
               document.styleSheets[0].rules[5].style.border = '1px solid #55A1FF'; 	 
               document.styleSheets[0].rules[7].style.border = 'none'; 	  		   
               document.styleSheets[0].rules[10].style.border = 'none'; 	  		   
		   }
           break

       case 16 : // menu_xp
		   cor_Menu_Ativa = '#CCCCCC';
		   cor_Menu_NaoAtiva = '#C61800'; 
		   cor_Fonte_Menu_Ativa = '#000000';
		   cor_Fonte_Menu_NaoAtiva = '#ffffff';
		   cor_Submenu_Ativa = '#ff0000';
		   cor_Submenu_NaoAtiva = '#C61800';
		   cor_Fonte_Submenu_Ativa = '#FFFFFF';
		   cor_Fonte_Submenu_NaoAtiva = '#FFFFFF';
           if(moz || nav == 'Opera') {
               document.styleSheets[0].cssRules[2].style.border = 'none'; 
               document.styleSheets[0].cssRules[5].style.border = '1px solid #ffffff'; 	 
               document.styleSheets[0].cssRules[7].style.border = 'none'; 	  		   
               document.styleSheets[0].cssRules[10].style.border = 'none'; 	  		   
		   }
		   else {
               document.styleSheets[0].rules[2].style.border = 'none'; 
               document.styleSheets[0].rules[5].style.border = '1px solid #ffffff'; 	 
               document.styleSheets[0].rules[7].style.border = 'none'; 	  		   
               document.styleSheets[0].rules[10].style.border = 'none'; 	  		
		   }
           break		   

       default : //branco
		   cor_Menu_Ativa = '#000000';
		   cor_Menu_NaoAtiva = '#FFFFFF'; 
		   cor_Fonte_Menu_Ativa = '#FFFFFF';
		   cor_Fonte_Menu_NaoAtiva = '#999999';
		   cor_Submenu_Ativa = '#000000';
		   cor_Submenu_NaoAtiva = '#FFFFFF';
		   cor_Fonte_Submenu_Ativa = '#FFFFFF';
		   cor_Fonte_Submenu_NaoAtiva = '#999999';
           break
      }
}