求助，ulr传递多个参数

Question

能否在这个基础多传递个参数？现在传递的是“cate”
<%radiovalue=request("radiovalue")%>,要把radiovalue加到url中，该如何修改
onChange="Javascript:window.location.href='index.asp?cate='+this.options[this.selectedIndex].value+'&txtname=<%=request("txtname")%>'"

Answer 1

onChange="Javascript:window.location.href='index.asp?cate='+this.options[this.selectedIndex].value+'&txtname=<%=request("txtname")%>&radiovalue=<%=radiovalue%>'"

Answer 2

onChange="Javascript:window.location.href='index.asp?cate='+this.options[this.selectedIndex].value+'&txtname=<%=request("txtname")%>'+&radiovalue=<%=request("radiovalue")%>'"
这样 ？