表单特殊输入处理收集

2022-07-15 80酷酷网 80kuku.com

　　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

　　只能是中文

　　只能是英文和数字.屏蔽了输入法

　　只能输入英文和数字

　　只能是数字

　　只能显示，不能修改的文本框

　　只能是数字,判断按键代码如下:

　　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 >

　　限制键盘的某个键：

　　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 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=" 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

　　上传预览图片

　　去掉下拉选项的边框

<div 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

　　TAB的显示

    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 >
<script>
alert("ok")
</script>
</textarea>

　　文本框的上/下拉

　　一个复选框，点击之后一组复选框全部都选上

　　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 <> 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: : '+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;
}

var webSiteID = 6;window.onload = function() {document.getElementById("txt_main").value = "<script>\nalert(')\n<\/script>";}
</script>
<BODY>
<table width='600' class='list' border='1' bgcolor='#eeeeee' bordercolorlight='#000000' bordercolordark='#FFFFFF' cellpadding='0' cellspacing='0'>
<tr bgcolor='#cccccc'>
    <td colspan='2' height='20' align='center'><b>Debug Textarea</b></td>
</tr>
<tr>
    <td colspan='2'>
        <table width='95%' border='0' align='center' >
      <tr>
        <td align='center'><br />
          <textarea id='txt_ln' name='content' rows='10' onselectstart='this.nextSibling.focus();return false' readonly></textarea><textarea id='txt_main' name='content' rows='10' cols='80' >
            </td>
          </tr>
        </table>
    </td>
</tr>
</table>
</BODY>
</HTML>

　　获取input的非value值，而是显示文本值

　　select里的option进行分类列表

<span inset #d3d6d9"><select width:200px">
<option selected>------------请选择------------</option>
<optgroup label="JavaScript&VBScript区">
<option>原创
<option>经典
<optgroup label="后台区">
<option>asp&sql
<option>php&mysql
</select></span>

　　动态添加

<form name="myForm" method="post">
<select name="dept_company" size="10" multiple id="dept_company" class="mySelect">
          <option value="">Please Select...</option>
          <option value="a">AA</option>
          <option value="b">BB</option>
          <option value="c">CC</option>
        </select><input name="dept_company_list" type="hidden">
        <input name="button" type="button" class="myButton" value="添加-->>">
        <input name="button" type="button" class="myButton" value="<<--删除">
        <select name="dept_company2" size="10" multiple id="dept_company2" class="mySelect">
        </select>
</form>
<script>
function addItem(fromName,toName){
    eval("var obj1=myForm."+fromName);
    eval("var obj2=myForm."+toName);
    obj1.options[0].selected=false;
    if(obj1.selectedIndex == -1)
        return false;
    var tempValue;
    var tempText;
    for(var i=1;i<obj1.length;i++){ //begin from 1
        if(obj1.selectedIndex == -1)break;
        tempValue=obj1.options[obj1.selectedIndex].value;
        tempText=obj1.options[obj1.selectedIndex].text;
        obj1.options[obj1.selectedIndex]=null;
        obj2.add(new Option(tempText,tempValue),0);
    }
}
function deleteItem(fromName,toName){
    eval("var obj1=myForm."+fromName);
    eval("var obj2=myForm."+toName);
    if(obj1.selectedIndex == -1)
        return false;
    var tempValue;
    var tempText;
    for(var i=0;i<obj1.length;i++){ //begin from 0
        if(obj1.selectedIndex == -1)break;
        tempValue=obj1.options[obj1.selectedIndex].value;
        tempText=obj1.options[obj1.selectedIndex].text;
        obj1.options[obj1.selectedIndex]=null;
        obj2.add(new Option(tempText,tempValue),1); //addItem index is 1
    }
}
</script>

　　提示限制输入的字符数

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
}

function changebyte2(value,length){
    var l=strlength(value)
    if (l<=length) {
        if (document.all!=null) document.all("byte2").innerText="还可以输入"+(length-l)+"字节"
    }
    else
    {
        document.all("byte2").innerText="输入字节数超出范围"
    }
    return true
}
</script>
<form method="post" name=test action="">
<TEXTAREA 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>

　　判断填写字数的限制