Record a few small details related to javascript_javascript skills

Many things are easy to forget inadvertently, so I choose to record them.

Firefox does not support the obj.innerText property.

The value displayed by obj.innerText alert() is undefined.

Firefox supports the innerHTML attribute but not innerText. If you don’t want to use innerHTML instead, you can use the following code

Since Firefox does not support document.all, when considering compatibility, you usually use document. getelementbyid('yourid').


if (document.all) { //If it is not IE
//You can also use if(navigator.appName.indexOf("Explorer") > - 1) // obj.innerText = "myText";}else { obj.textContent = "yourtext"; Replace with textContent
}

Firefox, IE compatible copy to clipboard javascript code

This function needs to modify a configuration when used under Firefox:
1. Open firefox and enter: about:config in the address bar
2. Find signed.applets.codebase_principal_support and set the value to true


function copyToClipboard(txt) {

if(window.clipboardData)
{
window.clipboardData.clearData();
window.clipboardData.setData(clipboardData() Text, txt);
}
else if(navigator.userAgent.indexOf(Opera) != -1)
{
window.location = txt;
}
else if (window.netscape) {
try {
netscape.security.PrivilegeManager.enablePrivilege(UniversalXPConnect);
}
catch (e)
{ alert(!! Rejected by browser! Please enter 'about:config' in the browser address bar and press Enter Then set 'signed.applets.codebase_principal_support' to 'true'); nsIClipboard);
if (!clip)
return;
var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
if (!trans)
return;
trans.addDataFlavor('text/unicode');
var str = new Object();
var str = new Object();
var str = Components.classes[@mozilla.org/supports-string;1].createInstance(Components.interfaces.nsISupportsString);
var copytext = txt;
str.data = copytext;
trans .setTransferData(text/unicode,str,copytext.length*2);
var clipid = Components.interfaces.nsIClipboard;
if (!clip)
return false;
clip.setData(trans ,null,clipid.kGlobalClipboard);
}
return true;
}

Or use the following code, which has the same function.

function CopyToClipboard(meintext)
{
    if (window.clipboardData) 
    {
        // the IE way
        window.clipboardData.setData("Text", meintext);
    }
    else if (window.netscape) 
    { 
        // this is important but not clearly stated anywhere:
        // you have to sign the code to enable this, or see notes below 
        netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');

         // create an interface to the clipboard
        var clip = Components.classes['@mozilla.org/widget/clipboard;1']
                        .createInstance(Components.interfaces.nsIClipboard);
        if (!clip) return;
        //alert(clip);
        // create a transferable
        var trans = Components.classes['@mozilla.org/widget/transferable;1']
                        .createInstance(Components.interfaces.nsITransferable);
        if (!trans) return;

        // specify what kind of data we want to collect; text in this case
        trans.addDataFlavor('text/unicode');

        // to retrieve the data from the transferable, we need 2 new objects 
        // to store it in 
        var str = new Object();
        var len = new Object();
        var str = Components.classes["@mozilla.org/supports-string;1"]
                        .createInstance(Components.interfaces.nsISupportsString);
        var copytext=meintext;
        str.data=copytext;
        trans.setTransferData("text/unicode",str,copytext.length*2);
        var clipid=Components.interfaces.nsIClipboard;
        if (!clip) return false;
        clip.setData(trans,null,clipid.kGlobalClipboard);
    }
    else
    {
        return false;
    }

    alert("您已经复制:"   meintext);
    return false;
}

用javascript获取客户端电脑名

前几天学习php的时候想实现获取客户端电脑名，在asp及.net下都有实现的例子，但一直没找到办法php下实现的方法。后来在国外的论坛里找到了一些代码，是javascript的。但只能运行于IE环境，而且必须把安全级别设置得相当低才可以。

try
{
var ax = new ActiveXObject("WScript.Network");
document.write('User:'   ax.UserName   '
');
document.write('Computer:'   ax.ComputerName   '
');
}
catch (e)
{
document.write('访问当前电脑名操作被拒绝'  '
');
}