本文实例讲述了JS实现一次性弹窗的方法。分享给大家供大家参考，具体如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script>
function openwin() {
window.open("","","width=200,height=200");
}
function get_cookie(name) {
var search = name+"=";
var returnvalue = "";
if(document.cookie.length>0) {
offset = document.cookie.indexOf(search);
if(offset!=-1) {
offset = search.length;
end = document.cookie.indexOf(";",offset);
if(end==-1) {
end = document.cookie.length;
}
returnvalue = unescape(document.cookie.substring(offset,end));
}
}
return returnvalue;
}
function loadpopup() {
if(get_cookie("popped")=='') {
openwin();
document.cookie="popped=yes";
}
}
</script>
</head>
<body onload="loadpopup();">
</body>
</html>
希望本文所述对大家JavaScript程序设计有所帮助。
