===============================
<html>
<head>
</head>
<body id="body">
<form action="https://maps.google.com/" id="exampleForm" method="get" name="q" onsubmit="return check()">
<input id="examplePass" name="q" type="text" />
<input type="submit" value="submit" />
</form>
</body>
<script>
document.getElementById("exampleForm").onsubmit = function(){
var passwordRegex =/^([+-]?)(180|(1[0-7][0-9](\.)?(\d)?(\d)?(\d)?(\d)?(\d)?(\d)?)|([0-9]?[0-9](\.)?(\d)?(\d)?(\d)?(\d)?(\d)?(\d)?)),([+-]?)(90|(([0-8]?[0-9])|([0-8]?[0-9](\.)(\d)(\d)?(\d)?(\d)?(\d)?(\d)?)))$/;
if(!passwordRegex.test(document.getElementById("examplePass").value)){
console.log("Regex didn't match");
return false;
var notify = document.getElementById("notify");
if(notify === null){
notify = document.createElement("p");
notify.textContent = "ERROR";
alert("錯誤!Incorrect format");
notify.id ="notify";
var body =document.getElementById("body");
body.appendChild(notify);
}
}
};
</script>
</html>
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