javaScript验证代码大全

这里有很多javascript有关大代码和他的使用方法

<script> function test() { if(document.a.b.value.length>50) { alert("不能超过50个字符！"); document.a.b.focus(); return false; } } </script> <form name=a onsubmit="return test()"> <textarea name="b" cols="40" wrap="VIRTUAL" rows="6"></textarea> <input type="submit" name="Submit" value="check"> </form>


2. 只能是汉字
1 <input onkeyup="value="/oblog/value.replace(/[^u4E00-u9FA5]/g,'')">


3. 只能是英文
1234567 <script language="javascript"> function onlyEng() { if(!(event.keyCode>=65&&event.keyCode<=90)) event.returnvalue=false; } </script>


1 <input onkeydown="onlyEng();">


4. 只能是数字
0102030405060708091011 <script language=javascript> function onlyNum() { if(!((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode>=96&&event.keyCode<=105))) //考虑小键盘上的数字键 event.returnvalue=false; } </script>


1 <input onkeydown="onlyNum();">


5. 只能是英文字符和数字
12 <input onkeyup="value="/oblog/value.replace(/[W]/g,"'') " onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^d]/g,''))">


6. 验证油箱格式
12345678 <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>


1 <input type=text onblur=isEmail(this.value)>


7. 屏蔽关键字(这里屏蔽***和****)
12345678 <script language="javascript1.2"> function test() { if((a.b.value.indexOf ("***") == 0)||(a.b.value.indexOf ("****") == 0)){ alert(":)"); a.b.focus(); return false;} } </script>


1234 <form name=a onsubmit="return test()"> <input type=text name=b> <input type="submit" name="Submit" value="check"> </form>


8. 两次输入密码是否相同
12345 <FORM METHOD=POST ACTION=""> <input type="password" id="input1"> <input type="password" id="input2"> <input type="button" value="test" onclick="check()"> </FORM>


0102030405060708091011121314 <script> function check() { with(document.all){ if(input1.value!=input2.value) { alert("false") input1.value = ""; input2.value = ""; } else document.forms[0].submit(); } } </script>

够了吧，屏蔽右键很酷

1 oncontextmenu="return false" ondragstart="return false" onselectstart="return false"

加在body中。



9. 表单项不为空
01020304050607080910111213 <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>


10. 比较两个表单项的值是否相同
010203040506070809101112 <script language="javascript"> <!-- function CheckForm() if (document.form.PWD.value != document.form.PWD_Again.value) { alert("您两次输入的密码不一样！请重新输入."); document.ADDUser.PWD.focus(); return false; } return true; } --> </script>