表单验证

mad_man

1. js验证radio是否选择<script language="javascript">  function checkform(obj) {    for(i=0;i<obj.oo.length;i++)       if(obj.oo[i].checked==true)         return true;      alert("请选择")return false;   }</script><form id="form1" name="form1" method="post" action="" >     <input type="radio" name="oo" value="radiobutton" />  <input type="radio" name="oo" value="radiobutton" />  <input type="submit" name="Submit" value="提交" /></form>2. 长度限制<script>  function test() {    if(document.a.b.value.length>50){      alert("不能超过50个字！");      document.a.b.focus();      return false;    }  }</script><form name=a >  <textarea name="b" cols="40" wrap="VIRTUAL" rows="6"></textarea>  <input type="submit" name="Submit" value="check"></form> 3. 只能是汉字 <input onkeyup="value="/oblog/value.replace(/[^\u4E00-\u9FA5]/g,'')">4." 只能是英文<script language=javascript>  function onlyEng(){    if(!(event.keyCode>=65&&event.keyCode<=90))      event.returnvalue=false;  }</script><input onkeydown="onlyEng();">5. 只能是数字<script language=javascript>  function onlyNum(){    if(!((event.keyCode>=48&&event.keyCode<=57)(event.keyCode>=96&&event.keyCode<=105)))//考虑小键盘上数字键      event.returnvalue=false;  }</script><input onkeydown="onlyNum();">6. 只能是英文字符和数字<input onkeyup="value="/oblog/value.replace(/[\W]/g,"'') "       onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))">7. 验证油箱格式<SCRIPT LANGUAGE=javascript RUNAT=Server>  function isEmail(strEmail) {    if (strEmail.search(/^\w+((-\w+)(\.\w+))*\@[A-Za-z0-9]+((\. -)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)          return true;elsealert("oh");  }</SCRIPT><input type=text onblur=isEmail(this.value)>8. 屏蔽关键字(这里屏蔽***和****)<script language="javascript1.2">  function test() {    if((a.b.value.indexOf ("***") == 0) (a.b.value.indexOf ("****") == 0)){      alert("");      a.b.focus();      return false;    }  }</script><form name=a >  <input type=text name=b><input type="submit" name="Submit" value="check"></form>9. 两次输入密码是否相同<FORM METHOD=POST ACTION="">   <input type="password" id="input1">   <input type="password" id="input2">   <input type="button" value="test" ></FORM><script>  function check(){     with(document.all){        if(input1.value!=input2.value){            alert("false")            input1.value = "";            input2.value = "";        }        else            document.forms[0].submit();     } }</script>10. 表单项不能为空<script language="javascript"><!--function CheckForm(){   if (document.form.name.value.length == 0) {     alert("请输入您姓名!");    document.form.name.focus();    return false;  }  return true;}--></script>11. checkbox控制全选//全选function checkboxAll(checkObj) {  var checkChoose = $(checkObj);  var all = checkChoose.attr("checked");   if (all) {var ch = $.find("input[type=checkbox]");$.each(ch,function(){$(this).attr("checked",true);});   }   else {   var ch = $.find("input[type=checkbox]");$.each(ch,function(){$(this).attr("checked",false);});   }  }<script type="text/javascript">  $(document).ready(function(){  isChooseAll();  $("#qxz").click(function(){  //选择所有checkbox对象  checkboxAll(this);  });    //双击事件操作  $('tr').dblclick(function(){  var checkbox = $(this).find('input[type="checkbox"]');  if (!$(checkbox).attr("checked")) {  $(checkbox).attr("checked",true);  }  else {  $(checkbox).attr("checked",false);  }  isChooseAll();  });    //单击事件全选操作  $("input[name=opers]").click(function(){  var checkbox = $(this).find('input[type="checkbox"]');  if (!$(checkbox).attr("checked")) {  $(checkbox).attr("checked",true);  }  else {  $(checkbox).attr("checked",false);  }  isChooseAll();  });  });    //对全选判断  function isChooseAll() {  var allChecked = $(document).find('input[name=opers]');  var chooseAll = true;  var j = 0;  for (var i = 0 ; i < allChecked.length; i++) {    var v_choose = $(allChecked[i]).attr("checked");  if (v_choose == "checked") {  chooseAll = true;  j++;  }  else {  chooseAll = false;  break;  }  }  if (j == allChecked.length) {  chooseAll = true;  }  if (chooseAll) {  $('#qxz').attr("checked",true);  }  else {  $('#qxz').attr("checked",false);  }  }  </script><script type="text/javascript">$(document).ready(function(){  $("#hdsz").click(function(){  var checkbox1 = $(document).find('input[type="checkbox"]');  if ($(checkbox1).attr("checked")) {  $(checkbox1).attr("checked",false);  $('#szltx').attr("checked",false);  $('#hdsz').attr("checked",true);  }  });  $("#szltx").click(function(){  var checkbox2 = $(document).find('input[type="checkbox"]');  if ($(checkbox2).attr("checked")) {  $(checkbox2).attr("checked",false);  $('#szltx').attr("checked",true);  }  });  $("#yplclbc").click(function(){  var checkbox3 = $(document).find('input[type="checkbox"]');  if ($(checkbox3).attr("checked")) {  $(checkbox3).attr("checked",false);  $('#yplclbc').attr("checked",true);  }  });  $("#czbz_qt").click(function(){  var checkbox4 = $(document).find('input[type="checkbox"]');  if ($(checkbox4).attr("checked")) {  $(checkbox4).attr("checked",false);  $('#czbz_qt').attr("checked",true);  }  });  });</script>