Some useful effects code for form (form) _ Form effects

Code that limits only what is write-qualified
The ENTER key allows the cursor to move to the next input box: <input onkeydown= "if (event.keycode==13) event.keycode=9" > <br>
Can only be Chinese: <input onkeyup= "Value=value.replace (/[-~]/g,") "onkeydown=" if (event.keycode==13) event.keycode=9 "> <br>
can only be in English and numbers. Blocked Input method: <input style= "ime-mode:disabled" onkeydown= "if (event.keycode==13) event.keycode=9" > <br >
can only input in English and number: <input onkeyup= "Value=value.replace (/[\w]/g,") "Onbeforepaste=" Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ') "onkeydown=" if (event.keycode==13) event.keycode=9 "> <br >
Can only be digital <input onkeyup= "Value=value.replace (/[^\d]/g,") "Onbeforepaste=" Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ') "><br>
Can only display, can not modify the text box <input readOnly value= "can only show, cannot modify" >
Only digits in input can be prompted when submitting
<script language=javascript>
function Onlynum ()
{
if (!) ( (event.keycode>=48&&event.keycode<=57) | | (event.keycode>=96&&event.keycode<=105) | | (event.keycode==8)))
Event.returnvalue=false;
}
</script>
<input onkeydown= "Onlynum ();" >
Drop-down list opens a window when you select a connection, a new window pops up
<select onchange= "If" (This.selectedindex && this.selectedindex!=0) {window.open (this.value);} this.selectedindex=0; " >
<option selected> More Links ......</option>
<option value= "Http://www.jb51.net";>cnbruce</option>
<option value= "Http://www.21west.net";>daonet</option>
<option value= "http://www.blueidea.com"; >blue!dea
</select>
A check box, click on the next set of check boxes are all selected
<input type= "checkbox" Name= Checka "onpropertychange=" for (i=0;i<a.children.length;i++) {a.children.checked= this.checked} ">a
<br>
<span id= "A" >
<input type= "checkbox" Name= "A1" >
<input type= "checkbox" Name= "A2" >
<input type= "checkbox" Name= "A3" >
</span>
option in Select to Classify list
<span style= "position:absolute;border:1px inset #d3d6d9" ><select style= "MARGIN:-2PX; width:200px ">
<option selected>------------Please select------------</option>
<optgroup label= "Javascript&vbscript District" >
<option> Original
<option> Classic
<optgroup label= "Backstage Area" >
<option>asp&sql
<option>php&mysql
</select></span>
Prompt to limit the number of characters entered
<script language= "JavaScript" >
<!--
function Symerror ()
{
return true;
}
Window.onerror = Symerror;
function Strlength (str) {
var l=str.length;
var n=l
for (Var i=0;i<l;i++)
{
if (Str.charcodeat (i) <0| | Str.charcodeat (i) >255) n++
}
return n
}
function Changebyte (value,length) {
var l=strlength (value)
if (l<=length) {
if (document.all!=null) document.all ("byte"). Innertext= "can also enter" + (LENGTH-L) + "byte"
}
Else
{
document.all ("byte"). Innertext= "Enter bytes out of range"
}
return True
}
function Changebyte1 (value,length) {
var l=strlength (value)
if (l<=length) {
if (document.all!=null) document.all ("Byte1"). innertext= "also can enter" + (LENGTH-L) + "byte"
}
Else
{
document.all ("Byte1"). innertext= "Enter bytes out of range"
}
return True
}
function Changebyte2 (value,length) {
var l=strlength (value)
if (l<=length) {
if (document.all!=null) document.all ("Byte2"). innertext= "also can enter" + (LENGTH-L) + "byte"
}
Else
{
document.all ("Byte2"). innertext= "Enter bytes out of range"
}
return True
}
</script>
<form method= "POST" Name=test onsubmit= "return Checkdata ()" action= "" >
<textarea onkeydown= "return changebyte1 (document.test.icqcontent.value,198)" onkeyup= "Return Changebyte1 ( document.test.icqcontent.value,198) "Name=icqcontent cols=40 rows=" 3 "></TEXTAREA>
<span id=byte1><script language=javascript>changebyte1 (document.test.icqcontent.value,198); </ Script></span>
</form>
Determine the limit of the number of words to fill
<script language=javascript>
function Gbcount (message,total,used,remain)
{
var Max;
max = Total.value;
if (Message.value.length > Max) {
Message.value = message.value.substring (0,max);
Used.value = max;
Remain.value = 0;
Alert (' message can not exceed the specified number of words! ');
}
else{
Used.value = Message.value.length;
Remain.value = Max-used.value;
}
}
</script>
<form name= ' MyForm ' >
<textarea name= ' guestcontent ' cols= ' rows= ' 6 ' Onkeydown=gbcount (This.form.guestcontent,this.form.total, This.form.used,this.form.remain); Onkeyup=gbcount (This.form.guestcontent,this.form.total,this.form.used,this.form.remain);></textarea>
Maximum words: <input disabled maxlength=4 name=total size=3 value=20>
Words used: <input disabled maxlength=4 name=used size=3 value=0>
Remaining words: <input disabled maxlength=4 name=remain size=3>
</form>
Register Read Time Wait button
<form action= "Http://www.jb51.net"; Method= "POST" name= "Agree" >
Welcome to register Soot Blog:
A number of articles ...
<input type= "Submit" value= "please look carefully < terms of service and declaration > ()" Name= "Agreeb" >
</form>
<script language=javascript>
<!--
var secs = 15;
Document.agree.agreeb.disabled=true;
for (i=1;i<=secs;i++) {
Window.settimeout ("Update (" + i + ")", I * 1000);
}
function Update (num) {
if (num = = secs) {
Document.agree.agreeb.value = "I agree";
Document.agree.agreeb.disabled=false;
}
else {
Printnr = Secs-num;
Document.agree.agreeb.value = "Please look carefully < terms and conditions of service > (" + Printnr + ")";
}
}
-->
</SCRIPT>