1.传参页面JavaScript代码：

window.location.href="test.jsp?username="+username;

2.接收参数页面:

window.onload=function(){
			var user = GetRequest()
			document.getElementById("userinfo").innerHTML = "欢迎："+user.username+"同学";
			document.getElementById("user").value=user.username;
		}
		
		function GetRequest() {
	        var url =decodeURI(decodeURI(location.search)); //获取url中"?"符后的字串，使用了两次decodeRUI解码
	        var theRequest = new Object();
	        if (url.indexOf("?") != -1) {
	            var str = url.substr(1);
	            strs = str.split("&");
	            for (var i = 0; i < strs.length; i++) {
	                theRequest[strs[i].split("=")[0]] = unescape(strs[i].split("=")[1]);
	            }
	            return theRequest;
	        }
		}

参考：https://www.cnblogs.com/xushengguan/p/7404749.html