jQuery使用笔记

获取div的宽度

当获取div的宽度为“100%”，想获取其具体的像素值px怎么办

平常的时候获取div的宽度方法：

document.getElementById("div_id").style.width;

但是当div的宽度样式设置为百分号制的时候需要通过clientWidth来获取其宽度。如下

document.getElementById("div_id").clientWidth;

获取及设置Form表单Ratio选中值

<div class="col-sm-6">
    <div class="radio">
        <label>
            <input type="radio" name="server_operate" value="server_init" class="minimal server_operate" checked /> 初始化  
        </label>
    </div>
    <div class="radio">
        <label>
            <input type="radio" name="server_operate" value="server_start" class="minimal server_operate" /> 启动  
        </label>
    </div>
    <div class="radio">
        <label>
            <input type="radio" name="server_operate" value="server_stop" class="minimal server_operate"  /> 停止  
        </label>
    </div>
    <div class="radio">
        <label>
            <input type="radio" name="server_operate" value="server_restart" class="minimal server_operate"  /> 重启  
        </label>
    </div>
    <div class="radio">
        <label>
            <input type="radio" name="server_operate" value="database_reset" class="minimal server_operate"  /> 重置数据库（慎重）  
        </label>
    </div>
</div>

获取Form表单Ratio选中值：

var operate = $("input:radio[name=\"server_operate\"]:checked").val();

选中值为server_init的Radio：

$("input[name='radioName'][value=server_init]").attr("checked", true);

获取Meta值

<meta name="csrf-token" content="G3CZ92cHXlKx24q8EDcRkYyD4wevXJ9Zp6GMPt2h" />

//jQuery获取Meta值
$("meta[name=\"csrf-token\"]").attr("content")