1. length limit:
<Script>
Function test ()
{
If (document. a. B. value. length> 50)
{
Alert ("cannot exceed 50 characters! ");
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. Only Chinese characters are allowed:
﹤input onkeyup="value="/oblog/value.replace(/[^\u4E00-\u9FA5]/g,'')"﹥ |
3. English only:
﹤ script language=java script ﹥
function onlyEng()
{
if(!(event.keyCode﹥=65&&event.keyCode﹤=90))
event.returnvalue=false;
}
﹤/ script ﹥﹤input onkeydown="onlyEng();"﹥ |
4. Only numbers are allowed:
<Script language = java script>
Function onlyNum ()
{
If (! (Event. keyCode >=48 & event. keyCode <= 57)| (Event. keyCode >=96 & event. keyCode <= 105 )))
// Consider the numeric keys on the keypad
Event. returnvalue = false;
}
</Script> <Input onkeydown = "onlyNum ();"> |
5. Only English characters and numbers are allowed:
﹤input onkeyup="value="/oblog/value.replace(/[\W]/g,"'')"onbeforepaste="clipboardData.setData('text',clipboardData.getData('text'). replace(/[^\d]/g,''))"﹥ |
6. Verify the email format:
﹤ script LANGUAGE=java script 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. Shielding keywords (here, shielding ***** and ****):
﹤ script language="java script 1.2"﹥
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. Whether the two passwords are the same:
﹤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 ﹥ |
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