原生js获取URL参数

//获取url后的参数值

function getUrlParam(key) {

var href = window.location.href;

var url = href.split("?");

if(url.length <= 1){

return "";

}

var params = url[1].split("&");

for(var i=0; i<params.length; i++){

var param = params[i].split("=");

if(key == param[0]){

return param[1];

}

}

    return "";

}

searchKeyword = getUrlParam("productName");