求助请帮我看一下这个代码哪里有错，打开出来什么都没有，
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Title</title>
<meta http-equiv="Content-Type" content="text/html";charst="utf-8" />
<script type="text/javascript">
function choices() {
var prefchoice = 1;
var statechoice = 'OR';
var genderchoice = 'F';
if (prefchoice === 1) {
alert("You've picked option 1.Here is what will happen...");
if (statechoice === 'OR') {
alert("You've picked 1 and you're from Oregon.");
if (prefchoice === 'M') {
alert("You've picked i and you're from Orgon and you're a man.");
}
}
}
}
</script>
</head>
<body onload="choices">
</body>
</html>
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Title</title>
<meta http-equiv="Content-Type" content="text/html";charst="utf-8" />
<script type="text/javascript">
function choices() {
var prefchoice = 1;
var statechoice = 'OR';
var genderchoice = 'F';
if (prefchoice === 1) {
alert("You've picked option 1.Here is what will happen...");
if (statechoice === 'OR') {
alert("You've picked 1 and you're from Oregon.");
if (prefchoice === 'M') {
alert("You've picked i and you're from Orgon and you're a man.");
}
}
}
}
</script>
</head>
<body onload="choices">
</body>
</html>
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JavaScript