webhacking.kr 20번

소스코드는 다음과 같다.

	<html>
	<head>
	<title>Challenge 20</title>
	<style type="text/css">
	body { background:black; color:white; font-size:10pt; }
	input { background:silver; color:black; font-size:9pt; }
	</style>
	</head>
	<body>
	<center><font size=2>time limit : 2</font></center>
	<form name=lv5frm method=post>
	<table border=0>
	<tr><td>nickname</td><td><input type=text name=id size=10 maxlength=10></td></tr>
	<tr><td>comment</td><td><input type=text name=cmt size=50 maxlength=50></td></tr>
	<tr><td>code</td><td><input type=text name=hack><input type=button name=attackme value="btmqtmlwxi"
	style=border:0;background=lightgreen onmouseover=this.style.font=size=30 onmouseout=this.style.font=size=15></td></tr>
	<tr><td><input type=button value="Submit" onclick=ck()></td><td><input type=reset></td></tr>
	</table>
	<script>
	function ck()
	{

	if(lv5frm.id.value=="") { lv5frm.id.focus(); return; }
	if(lv5frm.cmt.value=="") { lv5frm.cmt.focus(); return; }
	if(lv5frm.hack.value=="") { lv5frm.hack.focus(); return; }
	if(lv5frm.hack.value!=lv5frm.attackme.value) { lv5frm.hack.focus(); return; }

	lv5frm.submit();

	}
	</script>

	<br>

	do not programming!<br>

	this is javascript challenge

	</body>
	</html> lv5from.hack.value과 lv5frm.attackme.value가 같아야 하는데! 2초마다 바뀌므로 타자로 치기는 불가능하다. 따라서, 콘솔창을 이용했다!

lv5frm.id.value="a"

lv5frm.cmt.value="b"

lv5frm.hack.value=lv5frm.attackme.value

lv5frm.submit()