1. 长度限制
<script type="text/javascript">
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
function onlyEng() {
if(!(event.keyCode>=65&&event.keyCode<=90)) event.returnvalue=false;
}
</script>
<input onkeydown="onlyEng();"/>
4. 只能是数字
<script type="text/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. 验证邮箱格式
<script type="text/javascript">
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 type="text/javascript">
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
<from method=post action="">
<input type="password" id="input1"/>
<input type="password" id="input2"/>
<input type="button" value="test" onclick="check()"/>
</from>
<script type="text/javascript">
function check() {
with(document.all){
if(input1.value!=input2.value) {
alert("false") input1.value = ""; input2.value = "";
} else
document.forms[0].submit();
}
}
</script>
路政管理系统应用:
//非空验证
function checkoname(){
var casename= document.all['caseInfo.casename'].value;
if(casename==""){
alert("案由不能为空!请输入执法机构");
casename.focus();
return false;
}
return true;
}
//机构简称非空验证
function checkcpunishbase(){
var cpunishbase=document.all['caseInfo.cpunishbase'].value;
if(cpunishbase==""){
alert("处罚依据不能为空!请输入机构简称");
cpunishbase.focus();
return false;
}
return true;
}