Javascript Port Scan<br /><br />
<form>
Target:
<input type="text" name="target" value="www.baidu.com" />
Port:
<input type="text" name="port" value="80" />
Timeout:
<input type="text" name="timeout" value="1000" /><br /><br />
<label for="result">Result:</label><br />
<p id="p1"></p>
<textarea id="result" name="result" rows="10" cols="50"></textarea><br /><input class="button" type="button" value="SCAN" onclick="javascript:scan(this.form)" /></form>


<script>

var target="www.baidu.com";
var port=80;
var timeout=1000;
 
function scanPort(target,port,timeout)
{
	var img=new Image();
	img.onerror=function ()
	{
		if (!img) return;
		img=undefined;
		out(target,port,"open");
	}
	
	img.onload=img.onerror;
	img.src='http://'+target+':'+port;
		
	setTimeout(function() {
		if (!img) return;
        img = undefined;
		out(target,port,"close");
		},timeout);
	
}
 
 
function scanTarget(target,port,timeout)
{
	for(i=0;i<port.length;i++)
		scanPort(target,port[i],timeout);
}
 
 
var out=function(target,port,status) {
	result.value+=target+':'+port+'  '+status+"\n";
	// document.write("<a>"+target+':'+port+'  '+status+"\n"+"</a>");
	};
 
 
var scan=function(form)
{
	scanTarget(form.target.value, form.port.value.split(','), form.timeout.value)
	
}

scanTarget("127.0.0.1", "800".split(','), 1000);
</script>