PHP多条件分类列表筛选功能开发实例，前后台一起实现 后台对接可以拼接sql语句，PHP通过表单值隐藏值筛选，常用又实用！

function Filter(a, b) {

    var $ = function(e) {

        return document.getElementById(e);

    }

    var ipts = $('filterForm').getElementsByTagName('input'), result = [];

    for (var i = 0, l = ipts.length; i < l; i++) {

        if (ipts[i].getAttribute('to') == 'filter') {

            result.push(ipts[i]);

        }

    }

    if ($(a)) {

        $(a).value = b;

        for (var j = 0, len = result.length; j < len; j++) { 

            if (result[j].value == '' || result[j].value == '0') {

                result[j].parentNode.removeChild(result[j]);

            }

        }

        document.forms['filterForm'].submit();

    }

    return false;

}