一个解析url参数方法

function getRequestParameter(a) {
var b = document.location.search || document.location.hash;
if (a == null) return b;
if (b) {
b = b.substring(1).split("&");
for (var c = 0; c < b.length; c++) if (b[c].substring(0, b[c].indexOf("=")) == a) return b[c].substring(b[c].indexOf("=") + 1)
}
return ""
}