📄 ex13-4.htm

📁 《JAVASCRIPT 动态网页编程实例手册》一书中的源代码

💻 HTM

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    <html><head><title>删除Cookie</title><head>
    <script language = "JavaScript">
    <!-- 
    function delCookie (myform){
        tmpIndex=myform.choiceCookie.selectedIndex; 
        cookieName=myform.choiceCookie.options[tmpIndex].text;
        document.cookie = cookieName + "=" +"; expires=Mon, 01-01-2001 00:00:01 GMT";
        alert("已经删除指定的Cookie！");
     }
    function seeCookie(myform){
        if(document.cookie == ""){
            alert("已无任何Cookie！");
            return false;
        }
        else{
            for ( i=myform.choiceCookie.length - 1;i>-1; i--){
               myform.choiceCookie.remove(i);  //删除所有列表项
            }
            var myCookie = document.cookie.split("; ");
            for(i=0; i < myCookie.length; i++ ){
              newOption = document.createElement("OPTION"); 
              myform.choiceCookie.options.add(newOption,0);
              myform.choiceCookie.options[0].text=myCookie[i].split("=")[0];
            }
        }
    }
    // -->
    </script>
    </head>
    <body bgcoloR="lightgrey" onLoad="seeCookie(document.form1)" >
    <center>
    <h2> 删除和查看Cookie</h2>
    <form name="form1">
        请选择要删除的Cookie： <br>
        <select name="choiceCookie">
        </select> <p>
        <input type="button"
            name="deleteCookie"
            value="删除Cookie"
            onClick="delCookie(this.form);">
        <input type="button"
            name="viewCookie"
            value="查看Cookie"
            onClick="seeCookie(this.form);"> <p>
    </form>
    </center>
    </body>
    </html>

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