javascript変数

曖昧にしてたけどがっつり理解した！

<script type="text/javascript">
	var i = "iii";
	var j = "jjj";
	k = "kkk";
	l = "lll";

function f2(){
	alert("f2 is i="+i+" ,j= "+j+"k="+k+" ,l= "+l);// iii , jjj2, kkk2, lll
}

function f1(){
	alert("f1 is i="+i+" ,j= "+j+"k="+k+" ,l= "+l);// undefined , jjj , kkk , undefined
	var i = "iii2"; 
	j = "jjj2";
	k = "kkk2";
	var l = "lll2";
	alert("f1 is i="+i+" ,j= "+j+"k="+k+" ,l= "+l);// iii2 , jjj2, kkk2, lll2
	f2();
}

f1();
</script>