javascript函数（格式化数字，日期比较，光标处插入或修改文字，JS图片动画效果）

更新时间：2022-02-17 11:46:44

javascript格式化数字，如 8888.85745 格式化成 8,888.86
<html>
<head>
<title> New Document </title>
</head>
<body>
<script language="JavaScript">

</script>
<input name="text1" type="text" value="" onblur="this.value=formatnumber(this.value, true, 2, true)" />
</body>
</html>
//日期比较
function datecompare(date1, date2){
var d1 = new Date(date1.replace(/\-/g, "\/"));
var d2 = new Date(date2.replace(/\-/g, "\/"));
var flag = true;
if(isNaN(d1) || isNaN(d2))flag = false;//不是日期
if(flag &&
d1.getFullYear() > d2.getFullYear()){
flag = false;
}
if(flag &&
d1.getFullYear() == d2.getFullYear() &&
d1.getMonth() > d2.getMonth()){
flag = false;
}
if(flag &&
d1.getFullYear() == d2.getFullYear() &&
d1.getMonth() == d2.getMonth() &&
d1.getDate() > d2.getDate()){
flag = false;
}
return flag;
}
//cookie
function getcookievalue(sname){
var svalue="";
var sname=sname+"=";
if(document.cookie.length>0){
offset=document.cookie.indexOf(sname);
if(offset!=-1){
offset+=sname.length;
end=document.cookie.indexOf(";",offset);
if(end==-1)end=document.cookie.length;
svalue=unescape(document.cookie.substring(offset,end))
}
}
return svalue;
}
function setcookievalue(sname,svalue){
var expire="";
expire=new Date((new Date()).getTime()+31536000);
expire="; expires="+expire.toGMTString();
document.cookie=sname+"="+escape(svalue)+expire;
}
光标处插入或修改文字
function storeCaret(_obj1){
    if(_obj1.createTextRange)
        _obj1.caretPos = document.selection.createRange().duplicate();
}
function insertAtCaret() {
    var _obj1 = document.getElementById("textarea1");
    var _text = "[b]";
    _obj1.focus();
    storeCaret(_obj1);

    if(_obj1.createTextRange && _obj1.caretPos){
        var caretPos = _obj1.caretPos;
        caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ?_text + ' ' : _text;
    }else _obj1.value = _text;
}
JS图片动画效果
效果：http://www.carsclub.com.cn/
<style>
#flash_img {
    filter: revealtrans(duration=2.0,transition=12); width: 100%;
}
</style>

<table border="0" align="right" cellpadding="0" cellspacing="0">
                    <tr>
                      <td class="focus-ctl-nows" id="flash_show_ctl_0" onClick="showImage(0);">1</td>

                      <td class="focus-ctl" id="flash_show_ctl_1" onClick="showImage(1);">2</td>
                      <td class="focus-ctl" id="flash_show_ctl_2" onClick="showImage(2);">3</td>
                      <td class="focus-ctl" id="flash_show_ctl_3" onClick="showImage(3);">4</td>
                      <td class="focus-ctl" id="flash_show_ctl_4" onClick="showImage(4);">5</td>
                      <td> </td>
                    </tr>
                  </table>
<div id="flash_img" style="width:334px; height:167px;"></div>
cript language="javascript">
<!-
<s-
////////////////begin
var showImageIndex = -1;
var imageTimer = null;
function showImage(imageIndex)
{
    var flash_img_div = document.getElementById("flash_img");

    if(imageIndex>=fImgs.length){
        imageIndex = 0;
    }
    if(!fImgs[imageIndex] || imageIndex==showImageIndex)return false;
    var imgId = "__fImg"+imageIndex;
    flash_img_div.filters && flash_img_div.filters[0].Apply();
    for(var i=0; i<flash_img_div.childNodes.length; i++){
        flash_img_div.removeChild(flash_img_div.childNodes[i]);
    }
    for(var i=0; i<fImgs.length;i++){
        if(i == imageIndex)continue;
        document.getElementById("flash_show_ctl_" + i).className = "focus-ctl";
    }
    document.getElementById("flash_show_ctl_" + imageIndex).className = "focus-ctl-nows";
    var pos = fImgs[imageIndex].img.lastIndexOf(".");
    if( fImgs[imageIndex].img.substr(pos+1).substr(0,3).toLowerCase()=="swf" ){
        flash_img_div.innerHTML += '\
            <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" width="334" height="167" id="'+imgId+'">\
                <param name="movie" value="'+fImgs[imageIndex].img+'" />\
                <param name="quality" value="high" />\
                <param name="wmode" value="transparent">\
                <param name="scale" value="exactfit">\
                <embed src="'+fImgs[imageIndex].img+'" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="334" height="167"></embed>\
            </object>';
    }else{
        var img = new Image();
        img.border = "0";
        img.src = fImgs[imageIndex].img;
        img.width = "334";
        img.height = "167";
        var a = document.createElement("a");
        a.href = fImgs[imageIndex].href;
        a.title = fImgs[imageIndex].title;
        a.target = "_blank";
        a.id = imgId;
        a.appendChild(img);
        flash_img_div.appendChild(a);
    }
    flash_img_div.filters && flash_img_div.filters[0].Play();
    showImageIndex = imageIndex;
    return true;
}
function imagePlay()
{
    if(imageTimer) return;
    if(showImageIndex>=fImgs.length){
        showImageIndex = -1;
    }
    showImage(showImageIndex+1);
    imageTimer = setInterval(function(){
                    var stat = showImage(showImageIndex+1);
                    if(!stat){
                        imageStop();
                    }
                },8000);
}
function imageStop(){
    if(imageTimer)clearInterval(imageTimer);
    imageTimer = null;
}
function showNextImage(){
    showImage(showImageIndex+1);
}
function showPrevImage(){
    showImage(showImageIndex-1);
}
var fImgs = new Array();
fImgs[0] = {title:"",img:"upload/images/subject/2007-02-06/1174915891_outline.jpg",href:"news.php?id=220"};
fImgs[1] = {title:"",img:"upload/images/subject/2007-02-06/1175244094_outline.jpg",href:"news.php?id=212"};
fImgs[2] = {title:"",img:"upload/images/subject/2007-02-06/1177150583_outline.jpg",href:"news.php?id=219"};
fImgs[3] = {title:"",img:"upload/images/subject/2007-02-06/1175897263_outline.jpg",href:"news.php?id=217"};
fImgs[4] = {title:"",img:"upload/images/subject/2007-02-06/1177509461_outline.jpg",href:"news.php?id=213"};
////////////////end
window.document.body.onload = new function(){
    imagePlay();//焦点图文
}
//-->

</script>

本文转自博客园执着的笨蛋的博客，原文链接：javascript函数（格式化数字，日期比较，光标处插入或修改文字，JS图片动画效果），如需转载请自行联系原博主。

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javascript函数（格式化数字，日期比较，光标处插入或修改文字，JS图片动画效果）

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