function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
		oldonload();
		func();
		}
	}
}

function addClass(element,value) {
  if (!element.className) {
    element.className = value;
  } else {
    newClassName = element.className;
    newClassName+= " ";
    newClassName+= value;
    element.className = newClassName;
  }
}

//function setTab(m,n){
//	var tli=document.getElementById("tab"+m).getElementsByTagName("li");
//	var mli=document.getElementById("main"+m).getElementsByTagName("div");
//	for(i=0;i<tli.length;i++){
//	tli[i].className=i==n?"hover":"";
//	mli[i].style.display=i==n?"block":"none";
//	}
//}

function setTab(m,n){
	var tli=document.getElementById("tab"+m).getElementsByTagName("li");
	var mli_tmp=document.getElementById("main"+m).getElementsByTagName("div");
	var mli=new Array();
	var i = 0;
	for(j = 0; j < mli_tmp.length; j++){
		if(mli_tmp[j].parentNode.id == ("main"+m) ){
			mli[i] = mli_tmp[j];
			i++;
		}
	}
	for(i=0;i<tli.length;i++){
	tli[i].className=i==n?"hover":"";
	mli[i].style.display=i==n?"block":"none";
	
	}
}

// addLoadEvent(externallinks); // add function

// addClass(element,value); // add class