function OpenForm(layertoshow)
{
// Trata o Netscape
if(document.layers)
    {
    for(i=0;i<document.layers.length;i++)
	
       {
	   document.a1.visibility="hide";
	   document.a2.visibility="hide";
	   document.a3.visibility="hide";
	   document.a4.visibility="hide";
	   document.a5.visibility="hide";
	   document.a6.visibility="hide";
	   document.a7.visibility="hide";
	   document.a8.visibility="hide";
	   document.a9.visibility="hide";
	   }
	          
    document.layers[layertoshow].visibility="show";
    }

// Trata o Explorer da Microsoft
if(document.all)
    {
    	a1.style.visibility="hidden";
	a2.style.visibility="hidden";
	a3.style.visibility="hidden";
    	a4.style.visibility="hidden";
	a5.style.visibility="hidden";
	a6.style.visibility="hidden";
    	a7.style.visibility="hidden";
	a8.style.visibility="hidden";
	a9.style.visibility="hidden";

	       
    var attvisa=eval(layertoshow);
    
    attvisa.style.visibility="visible";
    }
}

function CloseForm(layertoshow)
{
// Trata o Netscape
if(document.layers)
    {
    for(i=0;i<document.layers.length;i++)	
       {
	   	if(document.a1.visibility="show") {document.a1.visibility="hide";}			
		if(document.a2.visibility="show") {document.a2.visibility="hide";}	   
	   	if(document.a3.visibility="show") {document.a3.visibility="hide";}       
	   	if(document.a4.visibility="show") {document.a4.visibility="hide";}			
		if(document.a5.visibility="show") {document.a5.visibility="hide";}	   
	   	if(document.a6.visibility="show") {document.a6.visibility="hide";}       
	   	if(document.a7.visibility="show") {document.a7.visibility="hide";}			
		if(document.a8.visibility="show") {document.a8.visibility="hide";}	   
	   	if(document.a9.visibility="show") {document.a9.visibility="hide";}
		
	   }
	          
	}

// Trata o Explorer da Microsoft
if(document.all)
	{
		if(a1.style.visibility="visible") {a1.style.visibility="hidden";}			
		if(a2.style.visibility="visible") {a2.style.visibility="hidden";}			
		if(a3.style.visibility="visible") {a3.style.visibility="hidden";}
		if(a4.style.visibility="visible") {a4.style.visibility="hidden";}			
		if(a5.style.visibility="visible") {a5.style.visibility="hidden";}			
		if(a6.style.visibility="visible") {a6.style.visibility="hidden";}
		if(a7.style.visibility="visible") {a7.style.visibility="hidden";}			
		if(a8.style.visibility="visible") {a8.style.visibility="hidden";}			
		if(a9.style.visibility="visible") {a93.style.visibility="hidden";}	
			
	}
}