js extract URL content

var str = "feima://transfer-dd?account=18680509833&amount=100";
 //str = "http://weixin.qq.com";
var regex1 = new RegExp("^(\\w+):?.*");
var arr1 = regex1.exec (str);
console.log(arr1);


var regex2 = new RegExp("^\\w+:\\/\\/([\\w|\\-|\\.]+)(?:\\?|$)");
var arr2 = regex2.exec (str);
console.log(arr2);

var regex3 = new RegExp("^.*?\\?(.*)$");
var arr3 = regex3.exec(str);
console.log(arr3);