function jcambioImg(id,img,pathDestino,pathOrigen)	
	{
	if(jesBlock(id))
		{
    if (document.layers) document.layers[''+id+''].src=pathOrigen;		
    else if (document.all) document.all[''+id+''].src=pathOrigen;		
    else if (document.getElementById) document.getElementById(img).src=pathOrigen;		
		}			
	else
		{
    if (document.layers) document.layers[''+id+''].src=pathDestino;		
    else if (document.all) document.all[''+id+''].src=pathDestino;		
    else if (document.getElementById) document.getElementById(img).src=pathDestino;		
		}
	}


function jcapaBlock(id)
	{
        if (document.layers) document.layers[''+id+''].display = "block"
        else if (document.all) document.all[''+id+''].style.display = "block"
        else if (document.getElementById) document.getElementById(id).style.display = "block"             
	}
function jcapaNone(id)
	{
        if (document.layers) document.layers[''+id+''].display = "none"
        else if (document.all) document.all[''+id+''].style.display = "none"
        else if (document.getElementById) document.getElementById(''+id+'').style.display = "none"             
	}
	
	

 function jesBlock(id)
 {
       if (document.layers) 
       	{
       	if (document.layers[''+id+''].display == "none")
       			return false;
       	else 
       			return true;
       	}
        else if (document.all) 
        			{
        			if(document.all[''+id+''].style.display == "none")	
      	       			return false;
			       	else 
			       				return true;
        			}        			
        else if (document.getElementById)
        		{
        		if(document.getElementById(''+id+'').style.display == "none")	
      	       			return false;
			       	else 
			       				return true;
        		} 
 	
}   

function jcambiaBlock(id)
	{
		if(jesBlock(id))
			{
			jcapaNone(id);
			}
		else
			{
			jcapaBlock(id);
			}
	}