用法: getParam("v");
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  
} 
原文:http://www.cnblogs.com/Mie929094441/p/7605657.html