function quote(s){
    return "'" + s + "'";
}


function ocultarDiv(divName){
	var o  = document.getElementById(divName);
	if(o != null){
		o.style.display = 'none';
	}
}

function mostrarDiv(divName){
	var o  = document.getElementById(divName);
	if(o != null){
		o.style.display = 'block';
	}
}

    
/** Cambia el display del div para links con imagenes */
function changeTRImgDisplay(trl,v,a,imgPic,showImage,hideImage){
    var tr = document.getElementById(trl);
    var l= document.getElementById(a);
    var i = document.getElementById(imgPic);
    if(tr != null){
        tr.style.display = v;
        if(v != 'BLOCK'){
        	if(i!=null){
	            i.src = hideImage;
	            }
            l.href="javascript:changeTRImgDisplay(" + quote(trl) + "," + "'BLOCK'" + "," + quote(a) + "," + quote(imgPic) + "," + quote(showImage) + "," + quote(hideImage) + ");";
        }
        else{
        	if(i!=null){
	            i.src = showImage;
	        }
            l.href="javascript:changeTRImgDisplay(" + quote(trl) + "," + "'none'" + "," + quote(a) + "," + quote(imgPic) + "," + quote(showImage) + "," + quote(hideImage) + ");";
        }
    }
    else{
    }
}