Nejde zkopírovat text. Jak to udělat

function disableSelection(e){if(typeof e.onselectstart!="undefined")e.onselectstart=function(){return false};else if(typeof e.style.MozUserSelect!="undefined")e.style.MozUserSelect="none";else e.onmousedown=function(){return false};e.style.cursor="default"}window.onload=function(){disableSelection(document.body)}

document.oncontextmenu=function(e){var t=e||window.event;var n=t.target||t.srcElement;if(n.nodeName!="A")return false}; //postará sa o pravé tlačidlo
document.ondragstart=function(){return false}; //postará sa o ľavé tlačidlo

window.addEventListener("keydown",function(e){if(e.ctrlKey&&(e.which==65||e.which==66||e.which==67||e.which==70||e.which==73||e.which==80||e.which==83||e.which==85||e.which==86)){e.preventDefault()}});document.keypress=function(e){if(e.ctrlKey&&(e.which==65||e.which==66||e.which==70||e.which==67||e.which==73||e.which==80||e.which==83||e.which==85||e.which==86)){}return false}

document.onkeydown=function(e){e=e||window.event;if(e.keyCode==123||e.keyCode==18){return false}} //toto rieši alt a f12