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有時(shí)為了某種需要，要求進(jìn)入一個(gè)頁(yè)面時(shí)彈出一個(gè)窗口．但每次進(jìn)入時(shí)都會(huì)彈出，就使人感受到煩．怎樣實(shí)只彈出一次呢？下面的程序?qū)?shí)現(xiàn)瀏覽才第一次訪問(wèn)這頁(yè)時(shí)彈出窗口，以后再進(jìn)入則不會(huì)彈出．
在<head>…..</head>之間加入下列代碼：
<script languang="javascript">
function openpopup(){
window.open("hello.htm","","width=300,height=300") //自己修改彈出窗口
}
function get_cookie(Name) {
var search = Name + "="
var returnvalue = "";
if (document.cookie.length > 0) {
offset = document.cookie.indexOf(search)
if (offset != -1) {
// if cookie exists
offset += search.length
// set index of beginning of value
end = document.cookie.indexOf(";", offset);
// set index of end of cookie value
if (end == -1)
end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}
function loadpopup(){
if (get_cookie("popped")==""){
openpopup()
document.cookie="popped=yes"
}
}
</script>
將如下代碼鍵入BODY區(qū)：
<body onload="loadpopup()">
//pop when enter page
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