JavaScript 表单非一般输入处理收集 _JavaScript

JavaScript 表单特殊输入处理收集

只能是写限定的东西代码如下:

ENTER 键可以让光标移到下一个输入框
<input onkeydown="if(event.keyCode==13)event.keyCode=9" > <br>

只能是中文<input onkeyup="value=value.replace(/[ -~]/g,'')" onkeydown="if(event.keyCode==13)event.keyCode=9"> <br>

只能是英文和数字.屏蔽了输入法<input style="ime-mode:disabled" onkeydown="if(event.keyCode==13)event.keyCode=9"> <br>

只能输入英文和数字<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>
只能是数字<input onkeyup="value=value.replace(/[^\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"><br>
只能显示，不能修改的文本框<input readOnly value="只能显示，不能修改">

只能是数字,判断按键代码如下:

<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();">?
附：获取键盘的 KeyCode

<html>
<head>
<script language="javascript">
? ns4 = (document.layers) ? true : false;
? ie4 = (document.all) ? true : false;
function keyDown(e){
? if(ns4){
? var nkey=e.which;
? var iekey='现在是ns浏览器';
? var realkey=String.fromCharCode(e.which);
}
? if(ie4){
? var iekey=event.keyCode;
? var nkey='现在是ie浏览器';
? var realkey=String.fromCharCode(event.keyCode);
? if(event.keyCode==32){realkey='\' 空格\''}
? if(event.keyCode==13){realkey='\' 回车\''}
? if(event.keyCode==27){realkey='\' Esc\''}
? if(event.keyCode==16){realkey='\' Shift\''}
? if(event.keyCode==17){realkey='\' Ctrl\''}
? if(event.keyCode==18){realkey='\' Alt\''}
}
? alert('ns浏览器中键值:'+nkey+'\n'+'ie浏览器中键值:'+iekey+'\n'+'实际键为'+realkey);
}
document.onkeydown = keyDown;
if(ns4){
document.captureEvents(Event.KEYDOWN);}
</script>
</head>
<body>
//Javascript Document.
<hr>
<center>
<h3>请按任意一个键。。。。</h3>
</center>
</body>
</html>
限制网页用键盘

<body onkeydown="alert('禁用');return false;">
限制键盘的某个键：body onkeydown="if(event.keyCode==num){alert('禁用');return false;}

再加个找按键的值

<script>
function show(){
? alert("ASCII代码是："+event.keyCode);
}
</script>
<body onkeydown="show()">

只能是IP地址
<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<style>
.a3{width:30;border:0;text-align:center}
</style>
<script>
function mask(obj){
obj.value=obj.value.replace(/[^\d]/g,'')
key1=event.keyCode
if (key1==37 || key1==39)
{ obj.blur();
nextip=parseInt(obj.name.substr(2,1))
nextip=key1==37?nextip-1:nextip+1;
nextip=nextip>=5?1:nextip
nextip=nextip<=0?4:nextip
eval("ip"+nextip+".focus()")
}
if(obj.value.length>=3)
if(parseInt(obj.value)>=256 || parseInt(obj.value)<=0)
{
alert(parseInt(obj.value)+"IP地址错误！")
obj.value=""
obj.focus()
return false;
}
else
{ obj.blur();
nextip=parseInt(obj.name.substr(2,1))+1
nextip=nextip>=5?1:nextip
nextip=nextip<=0?4:nextip
eval("ip"+nextip+".focus()")
}
}
function mask_c(obj)
{
clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))
}

</script>
<title>IP地址输入</title>

</head>
<body>IP地址输入
<div style="border-width:1;border-color:balck;border-style:solid;width:165;font-size:9pt">
<input type=text name=ip1 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip2 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip3 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip4 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>
</div>
</body>

</html>
用#default#savehistory防止后退清空text文本框：?

<HTML>
<HEAD>
<META NAME="save" CONTENT="history">
<STYLE>
? .saveHistory {behavior:url(#default#savehistory);}
</STYLE>
</HEAD>
<BODY>
<INPUT class=saveHistory type=text id=oPersistInput>
<input type=button onclick='javascript:location.href="http://www.cnbruce.com/red/"' value='点击进入,再按后退键试试？'>
</BODY>
</HTML>

TEXTAREA自适应文字行数的多少

<textarea rows=1 name=s1 cols=27 onpropertychange="this.style.posHeight=this.scrollHeight">

上传预览图片

<img id=pic? src=http://www.cnbruce.com/images/logo.gif>
<input type=file name=file><input type=button onclick=pic.src=file.value value=预览图片>
<input type=button onclick=alert(file.value) value=图片地址>
<input type=button onclick="file.outerHTML=file.outerHTML.replace(/value=\w/g,'')" value="清除file里字">

去掉下拉选项的边框

<div style="position: absolute; left: 10px; top: 10px; width: 115px; height: 20px;? clip:rect(2 114 20 2);">
?? <select>
??? <option >cnpeople</option>
??? <option >cnrose</option>
?? <option >cnbruce</option>?
? </select>
? </font>
</div>
下拉列表打开窗口

<select? onChange="if(this.selectedIndex && this.selectedIndex!=0){window.open(this.value);}this.selectedIndex=0;">
<option selected>更多链接……</option>
<option value="http://www.cnbruce.com">cnbruce</option>
<option value="http://daonet.myrice.com/old/">daonet</option>
<option value="http://www.blueidea.com">blue!dea
</select>

TAB的显示

<script>
function editTab()
{
??? var code, sel, tmp, r
??? var tabs=""
??? event.returnValue = false
??? sel =event.srcElement.document.selection.createRange()
??? r = event.srcElement.createTextRange()

??? switch (event.keyCode)
??? {
??????? case (8)??? :
??????????? if (!(sel.getClientRects().length > 1))
??????????? {
??????????????? event.returnValue = true
??????????????? return
??????????? }
??????????? code = sel.text
??????????? tmp = sel.duplicate()
??????????? tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
??????????? sel.setEndPoint("startToStart", tmp)
??????????? sel.text = sel.text.replace(/^\t/gm, "")
??????????? code = code.replace(/^\t/gm, "").replace(/\r\n/g, "\r")
??????????? r.findText(code)
??????????? r.select()
??????????? break
??????? case (9)??? :
??????????? if (sel.getClientRects().length > 1)
??????????? {
??????????????? code = sel.text
??????????????? tmp = sel.duplicate()
??????????????? tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
??????????????? sel.setEndPoint("startToStart", tmp)
??????????????? sel.text = "\t"+sel.text.replace(/\r\n/g, "\r\t")
??????????????? code = code.replace(/\r\n/g, "\r\t")
??????????????? r.findText(code)
??????????????? r.select()
??????????? }
??????????? else
??????????? {
??????????????? sel.text = "\t"
??????????????? sel.select()
??????????? }
??????????? break
??????? case (13)??? :
??????????? tmp = sel.duplicate()
??????????? tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
??????????? tmp.setEndPoint("endToEnd", sel)

??????????? for (var i=0; tmp.text.match(/^[\t]+/g) && i<tmp.text.match(/^[\t]+/g)[0].length; i++)??? tabs += "\t"
??????????? sel.text = "\r\n"+tabs
??????????? sel.select()
??????????? break
??????? default??????? :
??????????? event.returnValue = true
??????????? break
??? }
}
</script>

<textarea? cols=75? rows=20? onkeydown="editTab()">
<script>
alert("ok")
</script>
</textarea>

文本框的上/下拉

<form name="cnbruce">
<textarea name="com">
</textarea>
</form>
<SPAN title='放大输入框' style='FONT-SIZE: 12px; CURSOR: hand'? onclick=document.cnbruce.com.rows+=4>向下</SPAN>
?<SPAN title='缩小输入框' style='FONT-SIZE: 12px; CURSOR: hand' class='arrow' onclick='if(document.cnbruce.com.rows>=4)document.cnbruce.com.rows-=4;else return false'>向上</SPAN>

一个复选框，点击之后一组复选框全部都选上

<input type="checkbox" name="checkA" onpropertychange="for(i=0;i<A.children.length;i++){A.children[i].checked=this.checked}">a
<br>
<span id="A">
<input type="checkbox" name="A1">
<input type="checkbox" name="A2">
<input type="checkbox" name="A3">
</span>

Debug?Textarea：在线写?js?脚本的时候，用来即时查错的东西！

<HTML>
<HEAD>
<TITLE>Debug Textarea</TITLE>
<meta http-equiv='Content-Type' content='text/html; charset=gb2312'>
</HEAD>
<style>
* {
??? font-size: 12px
}
body {
??? margin: 10px; padding: 0px
}
table.list{
??? cursor: default;
??? border:1px solid #cccccc
??? background-color: #cccccc;
??? border-collapse: collapse;
??? border-Color: #cccccc;
}
</style>
<script language="javascript">
// Coded by windy_sk <windy_sk@126.com> 20040205

function reportError(msg,url,line) {
??? var str = "You have found an error as below: \n\n";
??? str += "Err: " + msg + " on line: " + line;
??? alert(str);
??? return true;
}

window.onerror = reportError;

function show_ln(){
??? var txt_ln???? = document.getElementById('txt_ln');
??? var txt_main???? = document.getElementById('txt_main');
??? txt_ln.scrollTop = txt_main.scrollTop;
??? while(txt_ln.scrollTop != txt_main.scrollTop) {
??????? txt_ln.value += (i++) + '\n';
??????? txt_ln.scrollTop = txt_main.scrollTop;
??? }
??? return;
}

function editTab(){
??? var code, sel, tmp, r
??? var tabs=''
??? event.returnValue = false
??? sel =event.srcElement.document.selection.createRange()
??? r = event.srcElement.createTextRange()

??? switch (event.keyCode){
??????? case (8)??? :
??????????? if (!(sel.getClientRects().length > 1)){
??????????????? event.returnValue = true
??????????????? return
??????????? }
??????????? code = sel.text
??????????? tmp = sel.duplicate()
??????????? tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
??????????? // 出错检验代码~~~~~~
??????????? if(sel.parentElement() != tmp.parentElement()) return;
??????????? sel.setEndPoint('startToStart', tmp)
??????????? sel.text = sel.text.replace(/^\t/gm, '')
??????????? code = code.replace(/^\t/gm, '').replace(/\r\n/g, '\r')
??????????? r.findText(code)
??????????? r.select()
??????????? break
??????? case (9)??? :
??????????? if (sel.getClientRects().length > 1){
??????????????? code = sel.text
??????????????? tmp = sel.duplicate()
??????????????? tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
??????????????? // 出错检验代码~~~~~~
??????????????? if(sel.parentElement() != tmp.parentElement()) return;
??????????????? sel.setEndPoint('startToStart', tmp)
??????????????? sel.text = '\t'+sel.text.replace(/\r\n/g, '\r\t')
??????????????? code = code.replace(/\r\n/g, '\r\t')
??????????????? r.findText(code)
??????????????? r.select()
??????????? }else{
??????????????? sel.text = '\t'
??????????????? sel.select()
??????????? }
??????????? break
??????? case (13)??? :
??????????? tmp = sel.duplicate()
??????????? tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
??????????? // 出错检验代码~~~~~~
??????????? if(sel.parentElement() != tmp.parentElement()) return;
??????????? tmp.setEndPoint('endToEnd', sel)
??????????? for (var i=0; tmp.text.match(/^[\t]+/g) && i<tmp.text.match(/^[\t]+/g)[0].length; i++)??? tabs += '\t'
??????????? sel.text = '\r\n'+tabs
??????????? sel.select()
??????????? break
??????? default??????? :
??????????? event.returnValue = true
??????????? break;
??? }
??? return;
}

function runcode() {
??? var str = document.getElementById("txt_main").value;
??? var code_win = window.open('about:blank');
??? code_win.document.open();
??? code_win.document.writeln("<script>");
??? code_win.document.writeln("function reportError(msg,url,line){\nline-=14;\nvar str='You have found an error as below: \\n\\n';\nstr+='Err: '+msg+' on line: '+(line);\nalert(str);\nopener.goto(line);\nopener.focus();\nwindow.onerror=null;\nsetTimeout('self.close()',10);\nreturn true;\n}");
??? code_win.document.writeln("window.onerror = reportError;");
??? code_win.document.writeln("<\/script>");
??? code_win.document.writeln(str);
??? code_win.document.close();
??? return;
}

function savecode() {
??? var str = document.getElementById("txt_main").value;
??? var code_win = window.open('about:blank','_blank','top=10000');
??? code_win.document.open();
??? code_win.document.writeln(str);
??? code_win.document.close();
??? code_win.document.execCommand('saveas','','code.html');
??? code_win.close();
??? return;
}

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="还可以输入"+(length-l)+"字节"
??? }
??? else
??? {
??????? document.all("byte").innerText="输入字节数超出范围"
??? }
??? return true
}

function changebyte1(value,length){
??? var l=strlength(value)
??? if (l<=length) {
??????? if (document.all!=null) document.all("byte1").innerText="还可以输入"+(length-l)+"字节"
??? }
??? else
??? {
??????? document.all("byte1").innerText="输入字节数超出范围"
??? }
??? return true
}