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）

javascript格式化数字，如 8888.85745 格式化成 8,888.86

<html>

<head>

<title> New Document </title>

</head>

<body>

<!--

//lael 2005-11-09

function formatnumber(fnumber,fdivide,fpoint,fround){

var fnum = fnumber + '';

var revalue="";

if(fnum==null){

for(var i=0;i<fpoint;i++)revalue+="0";

return "0."+revalue;

}

fnum = fnum.replace(/^\s*|\s*$/g,'');

if(fnum==""){

fnum=fnum.replace(/,/g,"");

if(fround){

var temp = "0.";

for(var i=0;i<fpoint;i++)temp+="0";

temp += "5";

fnum = Number(fnum) + Number(temp);

fnum += '';

var arrayf=fnum.split(".");

if(fdivide){

if(arrayf[0].length>3){

while(arrayf[0].length>3){

revalue=","+arrayf[0].substring(arrayf[0].length-3,arrayf[0].length)+revalue;

arrayf[0]=arrayf[0].substring(0,arrayf[0].length-3);

}

revalue=arrayf[0]+revalue;

if(arrayf.length==2&&fpoint!=0){

arrayf[1]=arrayf[1].substring(0,(arrayf[1].length<=fpoint)?arrayf[1].length:fpoint);

if(arrayf[1].length<fpoint)

for(var i=0;i<fpoint-arrayf[1].length;i++)arrayf[1]+="0";

revalue+="."+arrayf[1];

}else if(arrayf.length==1&&fpoint!=0){

revalue+=".";

return revalue;

}

//-->

</script>

</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;

d1.getFullYear() == d2.getFullYear() &&

d1.getMonth() > d2.getMonth()){

d1.getMonth() == d2.getMonth() &&

d1.getDate() > d2.getDate()){

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>

<tr>

</tr>

</table>

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 += '\

<param name="movie" value="'+fImgs[imageIndex].img+'" />\

<param name="quality" value="high" />\

<param name="wmode" value="transparent">\

<param name="scale" value="exactfit">\

</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(){

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

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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