btn.js

很好的一个论坛原代码

<script language="JavaScript">

function KeyUp (textEl){
	if(event.ctrlKey && window.event.keyCode==13 && document.post.Submit.disabled==false)
	{
		document.post.submit();
		document.post.Submit.disabled=true;
	}

        storeCaret (textEl);
}



function insertstr(NewCode) {
        if(document.all){
        	insertAtCaret(document.post.text, NewCode);
        	setfocus();
        } else{
        	document.post.text.value += NewCode;
        	setfocus();
        }
}


function storeCaret (textEl){

        if(textEl.createTextRange){
                textEl.caretPos = document.selection.createRange().duplicate();
        }
}


function insertAtCaret (textEl, text){
        if (textEl.createTextRange && textEl.caretPos){
                var caretPos = textEl.caretPos;
                caretPos.text += caretPos.text.charAt(caretPos.text.length - 2) == ' ' ? text + ' ' : text;
        } else if(textEl) {
                textEl.value += text;
        } else {
        	textEl.value = text;
        }
}


function btn_b() {
        if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[b]" + range.text + "[/b]";
        }
         else {
                txt=prompt("粗体文字:","粗体文字");

                if (txt!=null) {
                	AddTxt="[b]"+txt;
                	insertstr(AddTxt);
                        insertstr("[/b]");
                                }

        }
}

function btn_u() {
        if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[u]" + range.text + "[/u]";
        }
         else {
                txt=prompt("下划线文字:","下划线文字");

                if (txt!=null) {
                	AddTxt="[u]"+txt;
                	insertstr(AddTxt);
                        insertstr("[/u]");
                                }

        }
}

function btn_i() {
        if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[i]" + range.text + "[/i]";
        }
        else {
                txt=prompt("斜体文字:","斜体文字");
                if (txt!=null) {
                        AddTxt="[i]"+txt;
                        insertstr(AddTxt);
                        insertstr("[/i]");
                }
        }
}

function btn_url() {
        txt2=prompt("链接显示:\n如果置空则表示直接显示链接地址","");
                if (txt2!=null) {
                        txt=prompt("请输入 URL:","http://");
                        if (txt!=null) {
                                if (txt2=="") {
                                        AddTxt="[url]"+txt;
                                        insertstr(AddTxt);
                                        insertstr("[/url]");
                                } else {
                                        AddTxt="[url="+txt+"]"+txt2;
                                        insertstr(AddTxt);
                                        insertstr("[/url]");
                                }
                        }
                }
        }

function btn_img()
{
 txt=prompt("图片的URL地址:","http://");
 if(txt!=null)
 {
  AddTxt="\r[img]"+txt;
  insertstr(AddTxt);
  insertstr("[/img]");
 }
}

function btn_code() {
        if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[code]" + range.text + "[/code]";
        }
        else {
                txt=prompt("代码内容:","");
                if (txt!=null) {
                        AddTxt="\r[code]"+txt;
                        insertstr(AddTxt);
                        insertstr("[/code]");
                }
        }
}

function btn_swf()
{
 txt=prompt("Flash动画的URL地址:","http://");
 if(txt!=null)
 {
  AddTxt="\r[swf]"+txt;
  insertstr(AddTxt);
  insertstr("[/swf]");
 }
}

function btn_mp()
{
 txt=prompt("Windows Media Player文件的URL地址:","http://");
 if(txt!=null)
 {
  AddTxt="\r[mp]"+txt;
  insertstr(AddTxt);
  insertstr("[/mp]");
 }
}

function btn_rm()
{
 txt=prompt("RealPlayer文件的URL地址:","http://");
 if(txt!=null)
 {
  AddTxt="\r[rm]"+txt;
  insertstr(AddTxt);
  insertstr("[/rm]");
 }
}

function btn_q() {
        if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[quote]" + range.text + "[/quote]";
        }
        else {
                txt=prompt("引用内容:","文字");
                if(txt!=null) {
                        AddTxt="\r[quote]\r"+txt;
                        insertstr(AddTxt);
                        insertstr("\r[/quote]");
                }
        }
}

function showcolor(color) {
        if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[color=" + color + "]" + range.text + "[/color]";
        }
        else {
        txt=prompt("文字颜色:"+color,"文字");
                if(txt!=null) {
                        AddTxt="[color="+color+"]"+txt;
                        insertstr(AddTxt);
                        insertstr("[/color]");
                }
        }
}


function showsize(size) {
        if (document.selection && document.selection.type == "Text") {
		var range = document.selection.createRange();
		range.text = "[size=" + size + "]" + range.text + "[/size]";
        }
        else {
                txt=prompt("文字大小:"+ size,"文字");
                if (txt!=null) {
                        AddTxt="[size="+size+"]"+txt;
                        insertstr(AddTxt);
                        insertstr("[/size]");
                }
        }
}


function setfocus() {
        document.post.text.focus();
}

</script>