搜过的问题

js如何判断List长度

data.length

js获取链接？号后面指定的参数

function getParam(paramName) { 
    paramValue = "", isFound = !1; 
    if (this.location.search.indexOf("?") == 0 && this.location.search.indexOf("=") > 1) { 
        arrSource = unescape(this.location.search).substring(1, this.location.search.length).split("&"), i = 0; 
        while (i < arrSource.length && !isFound) arrSource[i].indexOf("=") > 0 && arrSource[i].split("=")[0].toLowerCase() == paramName.toLowerCase() && (paramValue = arrSource[i].split("=")[1], isFound = !0), i++ 
    } 
    return paramValue == "" && (paramValue = null), paramValue 
}