Useful script functions for javascript

function styleHeaderSiblings(){
if(!)return false;
var headers = ("h1");
for(var i = 0;i<;i++){
addClass(elem,"intro");
}
}
function styleElementSiblings(tag,thechass){
if(!)return false;
var elems = (tag);
for(var i = 0 ;i<;i++){
var elem = getNextElement(elem[i].nextSibling);
addClass(elem,theclass);
}
}
function addClass(elemnt,value){
if(!){
= value;
}else{
newClassName = ;
newClassName +="";
newClassName +=value;
= newClassName;
}
}