JS查找Panel下的TextBoxt

function saveConditions() {
        var panel = document.getElementById("<%= panelControls.ClientID%>");
        var childNodes = panel.childNodes;
        var hidConditions = document.getElementById("<%= hidConditions.ClientID %>");
        hidConditions.value = "";
        for (var i = 0; i < childNodes.length; i++) {
            if (childNodes[i].nodeName == "INPUT" && childNodes[i].value != "") {
                hidConditions.value += childNodes[i].id.split('_')[childNodes[i].id.split('_').length - 1] + "='" + childNodes[i].value + "'|";
            }
        }
    }