遇到问题的解决方案.docx

1多选框的问题(1)/科目多选框 function setsubject() var value = ; var check=document.getElementsByName(subject); for(var i=0;icheck.length;i+) if(checki.checked) value += checki.value + ,; document.getElementById(subject_values).value = value; (2) /科目必选一项 function check_subject() var subject = document.getElementsByName(subject); document.getElementById(subject).innerHTML=; var value = ; for(var i=0;isubject.length;i+) if(subjecti.checked) value += subjecti; if(value.length=0) document.getElementById(subject).innerHTML=科目必选一项! return false; 2Ajax请求(1)前台js：Function check_name new Ajax.Request(/users/check_user_name, asynchronous:true, evalScripts:true, method:get,parameters:name= + .value+&id=+, onSuccess:function(transport) alert(transport.responseText); ); return false;(2)后台控制器：#用户验证def check_user_name puts params:name user = User.find_by_name(params:name) puts user if user render :inline = 1 else render :inline = 2 endend用表单提交，加上插件 3action响应表单提交，使控制器响应，在控制器前头加上 skip_before_filter :verify_authenticity_token表单使ajax相应到控制器，必须加上 4生成随机数#生成随机数(1)后台： def get_phone_code(len=4) chars=(a.z).to_a+(A.Z).to_a+(0.9).to_a get_phone_code = 1.upto(len)|i|get_phone_codecharsrand(chars.size-1) get_phone_code #返回4位随机数 phone = Phone.new #新建phone表 phone.num = params:phone phone.code = get_phone_code phone.save #把随机数和电话保存phone表里 puts phone end然后在查询phone验证信息。(2)前台页面生成随机数： 无标题页 .code background-image:url(code.jpg); font-family:Arial; font-style:italic; color:Red; border:0; padding:2px 3px; letter-spacing:3px; font-weight:bolder; .unchanged border:0; var code ; /在全局 定义验证码 function createCode() code = ; var codeLength = 4;/验证码的长度 var checkCode = document.getElementById(checkCode); var selectChar =new Array(0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z);/ 所有候选组成验证码的字符，当然也可以用中文的 for(var i=0;icodeLength;i+) var charIndex = Math.floor(Math.random()*36); code +=selectCharcharIndex; if(checkCode) checkCode.className=code; checkCode.value = code; function validate () var inputCode = document.getElementById(input1).value; if(inputCode.length =0) alert(请输入验证码！); else if(inputCode != code ) alert(验证码输入错误！); createCode();/刷新验证码 else alert(- OK); (3)生成随机数，但在*.Html.erb中不能用随机码function setVerifyImg(img, inp, focus)if(Fid(img) Fid(img).src= /getimage?aid=15000102&+Math.random();if(Fid(inp) & focus!=false) Fid(inp).focus();  换一张 5各种验证/验证用户名非空只能是字母、数字、下划线组成的3-16位的正则表达式 ：a-zA-Z0-9_3,16$ var name = ; if(name.value=null|name.value=) document.getElementById(name).innerHTML=用户名不能为空!; name.select(); return false; /密码非空验证 var password = document.reg.password; var password2 = document.reg.password2; if(password.value=null|password.value=) document.getElementById(password).innerHTML=密码不能为空! return false; /密码长度验证 if(password.value.length6&password2.value.length6) document.getElementById(password).innerHTML=密码长度不能少于六位! return false; if(password.value!= password2.value) document.getElementById(password2).innerHTML=您两次输入的密码不一致! return false; /姓名验证 var user_name = document.reg.user_name if(user_name.value=null|user_name.value=) document.getElementById(user_name).innerHTML=姓名不能为空! return false; /昵称验证 var user_nich = document.reg.user_nich if(user_nich.value=null|user_nich.value=) document.getElementById(user_nich).innerHTML=昵称不能为空! return false; /身份证号验证 var user_card = document.reg.user_card; if(user_card.value=null|user_card.value=) document.getElementById(user_card).innerHTML=身份证号不能为空! return false; if(!(/d15$|d18$|d17x$/.test(user_card.value) document.getElementById(user_card).innerHTML=请输入15或18位! return false; /手机号验证 var phone = document.reg.phone; if(phone.value=) document.getElementById(phone).innerHTML=手机号不能为空! return false; var str=(130-9|150,8,3,5,6,9,1,7,2|180,9,2,7,8)d8$; var testRegExp = new RegExp(str, gi) ; if (!testRegExp.test(phone.value) document.getElementById(phone).innerHTML=手机号错误!; phone.selet(); return false; /手机验证码验证 var phone_check = document.reg.phone_check; if(phone_check.value=null|phone_check.value=) document.getElementById(phone_check).innerHTML=手机验证码不能为空! return false; /密保验证 var answer = document.reg.answer; if(answer.value=null|answer.value=) document.getElementById(answer).innerHTML=密保答案不能为空! return false; /QQ号码验证 var qq = document.reg.qq_code.value; if(!(qq =) if(!(/1-90-94,$/.test(qq) document.getElementById(qq_code).innerHTML=请输入正确的QQ号; return false; /邮箱验证 var email = document.reg.email.value; if(!(email=) if(!(/(a-zA-Z0-9+_|_|.?)*a-zA-Z0-9+(a-zA-Z0-9+_|_|.?)*a-zA-Z0-9+.a-zA-Z2,3$/.test(email) document.getElementById(email).innerHTML=您的邮箱有误！ return false; document.getElementById(reg).submit(); 6文件上传必须在里加上 :multipart = true就行了。（而在里加上enctype=MULTIPART/FORM-DATA7点击按钮，弹出一个新页面Hello worldfunction check() var flag = true; if (document.getElementById(search_key).value = 找人/随便搜 | document.getElementById(search_key).value = ) flag = false; alert(请输入你想搜索的条件); return false; if (document.getElementById(search_key).value.length 10) flag = false; alert(条件太多了，请不要超过10个字); return false; if (flag) document.getElementById(search_form).submit(); window.open(demo.html,blank_,scrollbars=yes,resizable=yes,width=650,height=650); /加上 blank_ 新跳转一个新的页面，也就是重新打开浏览器的一个页面；去掉 blank_ ，跳转的新标签页面。/div8sql 中排序问题 sql = select w.* from wishes w inner join users u on u.id=w.user_id where (u.passport like ? or u.nickname like ?) and w.status in(1,3,5) order by instr(3,5,1, w.status),w.created_at desc, %#content%, %#content% if types =1注:模糊查询, w.status in(1,3,5) -只查询status1，3，5的记录instr(3,5,1, w.status), 按status3，5，1的状态排序9字段截取在页面上：span style=color:#666 title=在帮助类中： def truncate(text, *args) options = args.extract_options! unless args.empty? ActiveSupport:Deprecation.warn(truncate takes an option hash instead of separate + length and omission arguments, caller) options:length = args0 | 30 options:omission = args1 | . end options.reverse_merge!(:length = 30, :omission = .) if text l = options:length - options:omission.mb_chars.length chars = text.mb_chars (chars.length options:length ? chars0.l + options:omission : text).to_s end end10分页在页面上： CustomPaginationRenderer if wishes.present? %在帮助类中：def will_paginate(collection = nil, options = ) options, collection = collection, nil if collection.is_a? Hash unless collection or !controller collection_name = #controller.controller_name collection = instance_variable_get(collection_name) raise ArgumentError, The #collection_name variable appears to be empty. Did you + forget to pass the collection object for will_paginate? unless collection end # early exit if there is nothing to render return nil unless WillPaginate:ViewHe