附加：js验证radio是否选择
<script
language="javascript">
function checkform(obj)
{
for(i=0;i<obj.oo.length;i++)
alert("请选择")
return false;
}
</script>
<form id="form1" name="form1" method="post"
action="" onsubmit="return
checkform(this)">
</form>
1. 长度限制
<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
<input
onkeyup="value="/oblog/value.replace(/[^u4E00-u9FA5]/g,'')">
3." 只能是英文
<script
language=javascript>
function onlyEng()
{
if(!(event.keyCode>=65&&event.keyCode<=90))
event.returnvalue=false;
}
</script>
<input
onkeydown="onlyEng();">
4. 只能是数字
<script
language=javascript>
function onlyNum()
{
if(!((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode>=96&&event.keyCode<=105)))
//考虑小键盘上的数字键
event.returnvalue=false;
}
</script>
<input
onkeydown="onlyNum();">
5. 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,''))">
6. 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;
else
alert("oh");
}
</SCRIPT>
<input type=text
onblur=isEmail(this.value)>
7. 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 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
<FORM METHOD=POST
ACTION="">
<input type="password"
id="input1">
<input type="password"
id="input2">
<input type="button" value="test"
onclick="check()">
</FORM>
<script>
function check()
{
with(document.all){
if(input1.value!=input2.value)
{
alert("false")
input1.value = "";
input2.value = "";
}
else document.forms[0].submit();
}
}
</script>