javascript| Script 1 > Shielding function class
1.1 Screen Keyboard all keys
<script language= "JavaScript" >
<!--
function Document.onkeydown () {
Event.keycode = 0;
Event.returnvalue = false;
}
-->
</script>
1.2 Screen right mouse button
Add Oncontextmenu=self.event.returnvalue=false to the body tag.
Or
<script language= "JavaScript" >
<!--
function Document.oncontextmenu ()
{
return false;
}
-->
</script>
function Nocontextmenu ()
{
if (document.all) {
Event.cancelbubble=true;
Event.returnvalue=false;
return false;
}
}
Or
<body oncontextmenu= "Nocontextmenu ()" >
<script language= "JavaScript" >
<!--
function Rclick ()
{
if (document.all) {
if (Event.button = = 2) {
Event.returnvalue=false;
}
}
}
-->
</script>
1.3 Mask CTRL + N, SHIFT+F10, F5 refresh, backspace key
<script language= "JavaScript" >
<!--
Screen the right mouse button, CTRL + N, SHIFT+F10, F5 refresh, backspace key
function Window.onhelp () {return false}//Shield F1 Help
function KeyDown () {
if ((Window.event.altKey) &&
((window.event.keycode==37) | |//Shielding ALT + Direction key ←
(window.event.keycode==39))) {//Shielding ALT + Direction key →
Alert ("You are not allowed to use ALT + arrow keys forward or back page!") ");
Event.returnvalue=false;
}
* Note: This is not really shielding ALT + arrow keys,
Because ALT + ARROW keys pop-up warning box, hold down the ALT key,
With the mouse point off the warning box, this shielding method is invalid. Later if
There is a master who has really shielded the Alt key method, please inform. */
if ((Event.keycode = 8) &&
(Event.srcElement.type!= "text" &&
Event.srcElement.type!= "textarea" &&
Event.srcElement.type!= "password") | | Mask BACKSPACE Delete key
(Event.keycode ==116) | | Mask F5 Refresh Key
(Event.ctrlkey && event.keycode==82)) {//ctrl + R
event.keycode=0;
Event.returnvalue=false;
}
if ((Event.ctrlkey) && (event.keycode==78))//Shield CTRL + N
Event.returnvalue=false;
if ((Event.shiftkey) && (event.keycode==121))//Shielding SHIFT+F10
Event.returnvalue=false;
if (Window.event.srcElement.tagName = "A" && Window.event.shiftKey)
Window.event.returnvalue = false; Screen shift plus left mouse button new page open
if ((Window.event.altKey) && (window.event.keycode==115)) {//Shield ALT+F4
Window.showmodelessdialog ("About
: blank "," "," dialogwidth:1px;dialogheight:1px ");
return false;}
}
/* can also be used to screen all the menu of IE window.open
The first method:
window.open ("Your. htm", "", "toolbar=no,location=no,directories= no,menubar=no,scrollbars=no,resizable=yes,status= No,top=0,left=0 ")
The second way is to open a Full-screen page:
window.open ("Your. asp", "", "Fullscreen=yes")
*/
-->
</script>
1.4 Screen browser in the upper right corner, minimize, maximize, close key
<script language=javascript>
function Window.onbeforeunload ()
{
if (event.clientx>document.body.clientwidth&&event.clienty<0| | Event.altkey)
{
Window.event.returnvalue = "";
}
}
</script>
or open the page with full screen
<script language= "JavaScript" >
<!--
window.open (www.32pic.com, "32pic", "fullscreen=3,height=100, width=400, Top=0, left=0, Toolbar=no, Menubar=no, Scrollbars=no, Resizable=no,location=no, Status=no ");
-->
</script>
Note: Add onbeforeunload= to the body tag "javascript
: Return False (make window not close)
1.5 Shielding F5 Key
<script language= "JavaScript" >
<!--
function Document.onkeydown ()
{
if (event.keycode==116)
{
Event.keycode = 0;
Event.cancelbubble = true;
return false;
}
}
-->
</script>
1.6 Screen IE Back button
Use <a href= "javascript when you link"
: Location.replace (URL) ">
1.7 Screen main Window scroll bar
Add style= "Overflow-y:hidden" to the body tag.
1.8 screen screen, constantly emptying the clipboard
Add it to the body tag.
1.9 Screen printing function of the website
<style>
@media Print {
* {Display:none}
}
</style>
1.10 Screen IE6.0 Save icon automatically appears on the picture
Method One:
<meta http-equiv= "Imagetoolbar" content= "no" >
Method Two:
1.11 All script in the screen page
<noscrript></noscript>
2 > form Submission Verification class
2.1 Form items cannot be empty
<script language= "JavaScript" >
<!--
function Checkform ()
{
if (Document.form.name.value.length = = 0) {
Alert ("Please enter your name!");
Document.form.name.focus ();
return false;
}
return true;
}
-->
</script>
2.2 Compare the values of two table items
<script language= "JavaScript" >
<!--
function Checkform ()
if (Document.form.PWD.value!= document.form.PWD_Again.value) {
Alert ("The password you entered two times is different!") Please re-enter. ");
Document. ADDUser.PWD.focus ();
return false;
}
return true;
}
-->
</script>
2.3 Form items can only be numbers and "_" for phone/bank account verification, can be extended to domain name registration, etc.
<script language= "JavaScript" >
<!--
function Isnumber (String)
{
var letters = "1234567890-"; You can add your own input value
var i;
var C;
if (String.charat (0) = = '-')
return false;
if (String.charat (string.length-1) = = '-')
return false;
for (i = 0; i < string.length i + +)
{
c = String.charat (i);
if (Letters.indexof (c) < 0)
return false;
}
return true;
}
function Checkform ()
{
if (! Isnumber (Document.form.TEL.value)) {
Alert ("Your phone number is not legal!") ");
Document.form.TEL.focus ();
return false;
}
return true;
}
-->
</script>
2.4 Table Single input value/length limit
<script language= "JavaScript" >
<!--
function Checkform ()
{
if (Document.form.count.value > | | Document.form.count.value < 1)
{
Alert ("The input value cannot be less than 0 or greater than 100!");
Document.form.count.focus ();
return false;
}
if (document.form.message.value.length<10)
{
Alert ("Input text is less than 10!");
Document.form.MESSAGE.focus ();
return false;
}
return true;
}
-->
</script>
2.5 Chinese/English/digital/email address legality judgment
<script language= "JavaScript" >
<!--
function Isenglish (name)//English value detection
{
if (name.length = 0)
return false;
for (i = 0; i < name.length; i++) {
if (Name.charcodeat (i) > 128)
return false;
}
return true;
}
function Ischinese (name)//Chinese value detection
{
if (name.length = 0)
return false;
for (i = 0; i < name.length; i++) {
if (Name.charcodeat (i) > 128)
return true;
}
return false;
}
function IsMail (name)/e-mail value detection
{
if (! Isenglish (name))
return false;
i = Name.indexof ("@");
j = Name.lastindexof ("@");
if (i = = 1)
return false;
if (i!= j)
return false;
if (i = = name.length)
return false;
return true;
}
function Isnumber (name)//numeric detection
{
if (name.length = 0)
return false;
for (i = 0; i < name.length; i++) {
if (Name.charat (i) < "0" | | name.charat (i) > "9")
return false;
}
return true;
}
function Checkform ()
{
if (! IsMail (Form). Email.value)) {
Alert ("Your email is illegal!) ");
Form. Email.focus ();
return false;
}
if (! isenglish (Form.name.value)) {
Alert ("The English name is illegal!") ");
Form.name.focus ();
return false;
}
if (! Ischinese (Form.cnname.value)) {
Alert ("Chinese name is illegal!") ");
Form.cnname.focus ();
return false;
}
if (! isnumber (Form). Publiczipcode.value)) {
Alert ("ZIP code not valid!) ");
Form. Publiczipcode.focus ();
return false;
}
return true;
}
-->
</SCRIPT>
2.6 Qualifying A form item cannot enter characters
<script language= "JavaScript" >
<!--
function contain (Str,charset)//string contains test functions
{
var i;
for (i=0;i<charset.length;i++)
if (Str.indexof (Charset.charat (i)) >=0)
return true;
return false;
}
function Checkform ()
{
if ((Contain (Document.form.NAME.value,%\ (\) ><)) | | (Contain (Document.form.MESSAGE.value, "%\ (\) ><"))
{
Alert ("entered an illegal character");
Document.form.NAME.focus ();
return false;
}
return true;
}
-->
</script>
