var id = null;

function show_block(id)
{
    if(document.getElementById(id).style.display =="none") {
        document.getElementById(id).style.display ="block";
        
    } else {
        document.getElementById(id).style.display ="none";
    }
}

function show_blockVer(id)
{
   
    var id1 = id;

    if(document.getElementById(id1).style.display =="block"){
        document.getElementById(id1).style.display ="none";
       
    }
    else{
        document.getElementById(id1).style.display ="block";
       
    }

}
function changeImageBlock(id,idImg){
    var Img=idImg;
    var ImgClose = document.getElementById(Img);
    var IdClicked = document.getElementById(id);
    if(IdClicked.style.display =="none"){
        ImgClose.src="../img/bt_close.gif";

    }
    else{

       ImgClose.src="../img/bt_open.gif";
    }
    
}

function show_blockDocVer(id)
{
    var inv = "-".concat(id);

    if(document.getElementById(id).style.display =="none"){
        document.getElementById(id).style.display ="block";
        document.getElementById(inv).style.display = "none";
    }
    
    else{
        document.getElementById(id).style.display ="none";
        document.getElementById(inv).style.display = "block";
    }
}

function show_blockDoc(id)
{
    if(id) {
        
        var inv = -id;

        if(document.getElementById(id).style.display =="none"){
            document.getElementById(id).style.display ="block";
            document.getElementById(inv).style.display = "none";
            
        } else {
            document.getElementById(id).style.display ="none";
            document.getElementById(inv).style.display = "block";
        }
    }
}