var omitformtags= new Array();
omitformtags[0] = "input";
omitformtags[1] = "select";
omitformtags[2] = "textarea";
omitformtags[3] = "radio";
omitformtags[4] = "checkbox";

function disableselect(e) { 
    var formObj = false;
    for (var i = 0; i < omitformtags.length; i++){
        if (e.target.tagName.toLowerCase() == omitformtags[i]){
            formObj = true;
        }
    }
    if (!formObj){
        return false;
    }
} 
function reEnable(){ 
    return true;
} 

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