【form】
<html>
<body>
<script language="JavaScript">
function show(){
var tar = document.form1.target;
if(tar == "_self"){
console.log("this window");
} else{
console.log("The target has not been specifically specified");
}
}
</script>
<form name="form1" action="post" target="_self">
<br><br><br>
<input type="button" value="submit" onClick='show()'>
</form>
</body>
</html>
