JS实现点击颜色块切换指定区域背景颜色的方法

时间:2020-05-13 代码家园人气:0

本文实例讲述了JS实现点击颜色块切换指定区域背景颜色的方法。分享给大家供大家参考。具体实现方法如下：

<html>
<head>
<title>JS实现点击颜色块切换指定区域的背景颜色</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">适时切换网页指定区域背景颜色</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
}
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"
    }
    document.cookie = cookie_string
}
if (bg_color) {
    bb1.style.backgroundColor = bg_color
}
</script>
</body>
</html>

希望本文所述对大家的javascript程序设计有所帮助。

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