Js适时切换网页背景颜色_页面背景特效

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为了提高用户体验和风页风格的需要，一些网站在网页上加入了让用户自己选择网页或某个区域的背景颜色，这就要用到JavaScript技术了，另外还用到有Cookies技术，将用户的选择保存在电脑里，避免用用户再次选择的麻烦，在DISCUZ论坛里，大家会看到这种功能，本段代码就实现了此功能。

<html>
<head>
<meta http-equiv="Content-Language" mrc="zh-cn">
<meta http-equiv="Content-Type" mrc="text/html; charset=gb2312">
<title>适时切换背景颜色</title>
</head>
<body>
<div align="center">
<table bgcolor=#F8F8F8 border="0" width="500" cellpadding="0" style="border-collapse: collapse" height="180" id="bb1">
<tr>
<td colspan="2">
<div align="center">
<table border="0" width="90%" cellpadding="0" style="border-collapse: collapse" height="90" id="table2">
<tr><td style="line-height: 150%"><span style="font-size: 14px">模板无忧（<a href="/">mb5u.com</a>）提供各类网页模板、视频教程、JavaScript/CSS特效代码以及常用软件下载等，做有质量的学习型源码下载站。</span></td>
</tr></table>
</div>
</td>
</tr></table></div>
<div align="center">
<table border="0" width="500" cellpadding="0" style="border-collapse: collapse" height="20" id="table1">
<tr><td width="219"><p align="right"><font color="#808080"><span style="font-size: 9pt">请选择背景：</span></font></td>
<td width="281"><div align="center"><table border="1" width="240" cellspacing="0" cellpadding="0" height="20" id="table1" style="border-collapse: collapse" bordercolor="#FFFFFF">
<tr>
<td width="60" onClick="bb1.style.backgroundColor='FDFDF0';set_color('FDFDF0')" bgcolor="#FDFDF0"></td>
<td onClick="bb1.style.backgroundColor='B1D5F3';set_color('B1D5F3')" bgcolor="#B1D5F3" width="60"></td>
<td onClick="bb1.style.backgroundColor='B4E7D9';set_color('B4E7D9')" bgcolor="#B4E7D9" width="60"></td>
<td onClick="bb1.style.backgroundColor='F1E8FF';set_color('F1E8FF')" bgcolor="#F1E8FF" width="60"></td>
<td onClick="bb1.style.backgroundColor='E8FFF3';set_color('E8FFF3')" bgcolor="#E8FFF3" width="60"></td>
<td onClick="bb1.style.backgroundColor='CDCDDE';set_color('CDCDDE')" bgcolor="#CDCDDE" width="60"></td>
</tr>
</table>
</div></td></tr></table>
</div>
<script language=javascript>
function get_cookie(name_to_get) {

var cookie_pair
    var cookie_name
    var cookie_value
    var cookie_array = document.cookie.split("; ")
    for (counter = 0; counter < cookie_array.length; counter++) {
        cookie_pair = cookie_array[counter].split("=")
        cookie_name = cookie_pair[0]
        cookie_value = cookie_pair[1]
        if (cookie_name == name_to_get) {
            return unescape(cookie_value)
        }
    }
    return null
}

// Get the bgColor cookie
var bg_color = get_cookie("bgColor_cookie")
function set_color(color_val) {
 set_cookie("bgColor_cookie", color_val, 365, "/")
}

function set_cookie(cookie_name, cookie_value, cookie_expire, cookie_path, cookie_domain, cookie_secure) {
    var cookie_string = cookie_name + "=" + cookie_value
    // /
    if (cookie_expire) {
        var expire_date = new Date()
        var ms_from_now = cookie_expire * 24 * 60 * 60 * 1000
        expire_date.setTime(expire_date.getTime() + ms_from_now)
        var expire_string = expire_date.toGMTString()
        cookie_string += "; expires=" + expire_string
    }

if (cookie_path) {
        cookie_string += "; path=" + cookie_path
    }
    if (cookie_domain) {
        cookie_string += "; domain=" + cookie_domain
    }
    if (cookie_secure) {
        cookie_string += "; true"
    }
    // Set the cookie
    document.cookie = cookie_string
}
if (bg_color) {
    bb1.style.backgroundColor = bg_color
}
</script>
</body>
</html>

所属频道：页面背景特效/更新时间：2012-12-21

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