function styleHeaderSiblings(){

if(!document.getElementByTagName)return false;

var headers = document.getElementByTagName("h1");

for(var i = 0;i<headers.length;i++){

addClass(elem,"intro");

}

}

function styleElementSiblings(tag,thechass){

if(!document.getElementByTagName)return false;

var elems = document.getElementsByTagName(tag);

for(var i = 0 ;i<elems.length;i++){

var elem = getNextElement(elem[i].nextSibling);

addClass(elem,theclass);

}

}

function addClass(elemnt,value){

if(!element.className){

element.className = value;

}else{

newClassName = element.className;

newClassName +="";

newClassName +=value;

element.className = newClassName;

}

}