var omitformtags=["input", "textarea", "select"];

omitformtags=omitformtags.join("|");

function disableselect(e){
if (omitformtags.indexOf(e.target.tagName.toLowerCase())==-1)
return false;
}

function reEnable(){
return true;
}

if (typeof document.onselectstart!="undefined")
document.onselectstart=new Function ("return false");
else{
document.onmousedown=disableselect;
document.onmouseup=reEnable;
}