function disableSelection(target){
if (typeof target.onselectstart!="undefined") //For IE
   target.onselectstart=function(){return false}
else if (typeof target.style.MozUserSelect!="undefined") //For Firefox
   target.style.MozUserSelect="none"
else //All other route (For Opera)
   target.onmousedown=function(){return false}
target.style.cursor = "default"
}