JS get URL parameter value

function getquerystring (name) {   var reg = new RegExp ("(^|&)" + name + "= ([^&]*] (&|$)", "I");   Here are the following two lines for testing to show you   //test start   var ur= "? id=111&bb=33333";//Real Environment Delete   var r = ur.substr (1). Match (reg);// Delete   //test end in real environment,   //Real environment please use the following sentence.   //var r = Window.location.search.substr (1). Match (reg);//Real environment please use this   if (r!=null) return (r[2]); return null;} document.write ("Gets the ID value in the URL is:" +getquerystring ("id") + "<br>");d ocument.write ("Get the BB value in the URL is:" +getquerystring (" BB "));

　　

JS get URL parameter value