Insira este código na página desejada ou então na coluna para bloquear a seleção no site todo.

<center></head><script type="text/javascript">function disableSelection(target){if (typeof target.onselectstart!="undefined") //IE routetarget.onselectstart=function(){return false}else if (typeof target.style.MozUserSelect!="undefined") //Firefox routetarget.style.MozUserSelect="none"else //All other route (ie: Opera)target.onmousedown=function(){return false}target.style.cursor = "default"}</script></html><script type="text/javascript">disableSelection(document.body) //disable text selection on entire body of page</script></center>

creditos:Ajudante Online