This article provides a jquery traversal select tutorial code, which mainly uses the form of $("#<%=ddl_xreg_id.clientid%> option").each(function() { to traverse each once, so All selections are queried once
Method 2
function autoscrollregion() {
var reg_name = $("#<%=txt_reg_name.clientid%>").val();
$("#<%=ddl_xreg_id.clientid%> option").each(function() {
this).attr("selected", "selected");
break;
}
});
}
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
