javascript代码库

//正则表达试


function RegCheck(reg,str)//reg--数组，str字符串
{
var sign=false;
for (var i=0;i<reg.length;i++)
{
if(reg[i].test(str)==true)
{
sign=true
break;
}
}
return sign;
}
function isNUmber(str)//验证字符串是否是数字
{
var reg = new Array(/^-?\d+$/,/^(-?\d+)(\.\d+)?$/);
return RegCheck(reg,str);
}


//×××××××××正则表达式使用**************//

//验证是否是数字

function regIsNumber(fData)
{
    var reg = new RegExp("^[-]?[0-9]+[\.]?[0-9]+$");
    return reg.test(fData)
}

//×××××××××正则表达式使用**************//



//javascript操作cookie

function addCookie(objName,objValue,objHours){//添加cookie
    var str = objName + "=" + escape(objValue);
    if(objHours &gt; 0){//为0时不设定过期时间，浏览器关闭时cookie自动消失
     var date = new Date();
     var ms = objHours*3600*1000;
     date.setTime(date.getTime() + ms);
     str += "; expires=" + date.toGMTString();
    }
    document.cookie = str;
    alert("添加cookie成功");
   }
  
   function getCookie(objName){//获取指定名称的cookie的值
    var arrStr = document.cookie.split("; ");
    for(var i = 0;i < arrStr.length;i ++){
     var temp = arrStr[i].split("=");
     if(temp[0] == objName) return unescape(temp[1]);
    }
   }
  
   function delCookie(name){//为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时间
    var date = new Date();
    date.setTime(date.getTime() - 10000);
    document.cookie = name + "=a; expires=" + date.toGMTString();
   }
//读取出来所有的cookie字筗串了
   function allCookie(){//读取所有保存的cookie字符串
    var str = document.cookie;
    if(str == ""){
     str = "没有保存任何cookie";
    }
    alert(str);
   }
  

//flash调用代码--ur图片地址，w--width,h-height

function flash(ur,w,h){ 
document.write('<object classid="clsid:D27CDB6E-AE6D-11CF-96B8-444553540000" id="obj1" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" border="0" width="'+w+'" height="'+h+'">'); 
document.write('<param name="movie" value="'+ur+'">'); 
document.write('<param name="quality" value="high"> '); 
document.write('<param name="wmode" value="transparent"> '); 
document.write('<param name="menu" value="false"> '); 
document.write('<embed src="'+ur+'" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" name="obj1" width="'+w+'" height="'+h+'" quality="High" wmode="transparent">'); 
document.write('</embed>'); 
document.write('</object>'); 
}

//alert自动关闭

function autoCloseAlert(msg)
   {
      var tempFrm=document.getElementById("msgFrm");
   if(tempFrm==null||typeof(tempFrm)=="undefined")
   {
     tempFrm =document.createElement("iframe");
document.body.appendChild(tempFrm); 
tempFrm.id = "msgFrm";   
     tempFrm.name ="msgFrm";
     tempFrm.style.display="none";
   }
   msg=msg.replace(/"/g,"\\\"");
   msg=msg.replace(/\n/g,"\\n");
   var sfeature="status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;";
   msgFrm.showModelessDialog("javascript:alert(\""+msg+"\");window.close();","",sfeature);
   setTimeout("msgFrm.location.reload();",1000);
}
    //重写弹出框
var oldAlert = window.alert;
    window.alert = function(msg)
    {
      var tempEvent=window.event;
    if(tempEvent==null)
    {
       oldAlert(msg);
    }else
    {
       autoCloseAlert(msg);
    }
    }

//按相对比例显示图片大小

/*按比例生成缩略图*/
function DrawImage(ImgD,W,H){ 
var flag=false; 
var image=new Image(); 
image.src=ImgD.src; 
if(image.width>0 && image.height>0){ 
    flag=true; 
    if(image.width/image.height>= W/H){ 
      if(image.width>W){
        ImgD.width=W; 
        ImgD.height=(image.height*H)/image.width; 
      }
   else{ 
        ImgD.width=image.width;
        ImgD.height=image.height; 
      } 
      ImgD.alt= ""; 
    } 
    else{ 
      if(image.height>H){
        ImgD.height=H; 
        ImgD.width=(image.width*W)/image.height; 
      }
   else{ 
        ImgD.width=image.width;
        ImgD.height=image.height; 
      } 
      ImgD.alt=""; 
    } 
}
}

//批量替换标签内容

function ReplaceByTagName(tagName,findContent,replaceContent)
{
var divs=document.getElementsByTagName(tagName);
for (var i=0;i<divs.length;i++ )
{
         if (divs[i].innerHTML.search(findContent)>-1)
            {
             divs[i].innerHTML=replaceContent;
            }

}

}

//Form表单操作

    function getRadioCheckedValue(str)//获得被选单选按钮的值
{
var d = document.getElementsByName(str);
for(var i = 0; i < d.length; i++)
{
if(d[i].checked){
return d[i].value;
}
}
}


//判断浏览器版本

function getOs()
{
if(navigator.userAgent.indexOf("MSIE")>0)return 1;
if(isFirefox=navigator.userAgent.indexOf("Firefox")>0)return 2;
if(isSafari=navigator.userAgent.indexOf("Safari")>0)return 3; 
if(isCamino=navigator.userAgent.indexOf("Camino")>0)return 4;
if(isMozilla=navigator.userAgent.indexOf("Gecko/")>0)return 5;
return 0;
}

//判断是否为数字---false：不是数字

function isNum(str) {
//判断是否是整数
//str = parseInt(str);
//alert(str);
var i;
for(i=0; i<str.length; i++) {
if (str.charAt(i) == ".") {
return false;
}
}
return !isNaN(str);

//return (!isNaN(parseInt(str))) ? true : false; 


}

function checkNum(str)
{
if (isNaN(str))
{
return false;
}

else

{

returen true;

}

}

//将字符串转换为日期

function Swith(strdate){
var strYear=strdate.substring(0,4);
var strMonth=strdate.substring(5,7); 
var strDay=strdate.substring(8,10);
var strHours=strdate.substring(11,13);
var strMinutes=strdate.substring(14,17);
return new Date(strYear,strMonth,strDay,strHours,strMinutes); 
}

//获得两个日期相减的值 -dateM：相减值；datetype:取值类型


function GetTime(dateM,datetype){
var s;                            // 声明变量。
var MinMilli = 1000 * 60;         // 初始化变量。
var HrMilli = MinMilli * 60;
var DyMilli = HrMilli * 24;
s="";
if (datetype=="d"){
s +=Math.round(Math.abs(dateM/DyMilli));
}else if (datetype=="h"){
s +=Math.round(Math.abs(dateM/HrMilli))+"小时"
}else if (datetype=="m"){
s +=Math.round(Math.abs(dateM/MinMilli))+"分";
} else{
s +=Math.round(Math.abs(dateM/1000))+"秒"
}
return(s);                        // 返回结果。
}

//js判断是否为日期

function isDateString(sDate)
{    var iaMonthDays = [31,28,31,30,31,30,31,31,30,31,30,31]
var iaDate = new Array(3)
var year, month, day

    if (arguments.length != 1) return false
iaDate = sDate.toString().split("-")
if (iaDate.length != 3) return false
if (iaDate[1].length > 2 || iaDate[2].length > 2) return false

    year = parseFloat(iaDate[0])
month = parseFloat(iaDate[1])
day=parseFloat(iaDate[2])

    if (year < 1900 || year > 2100) return false
if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) iaMonthDays[1]=29;
if (month < 1 || month > 12) return false
if (day < 1 || day > iaMonthDays[month - 1]) return false
return true
}

//iframe高度自适应

function reinitIframe(iframeID){

var iframe = document.getElementById(iframeID);

try{

var bHeight = iframe.contentWindow.document.body.scrollHeight;

var dHeight = iframe.contentWindow.document.documentElement.scrollHeight;

var height = Math.max(bHeight, dHeight);

iframe.height = height;

}catch (ex){}

}

//创建xmldom
function getXmldom()
{
if (window.ActiveXObject){
var xmlDom=new ActiveXObject("Microsoft.XMLDOM");
}else{
if (document.implementation&&document.implementation.createDocument){
var xmlDom=document.implementation.createDocument("","doc",null);
}
}
xmlDom.async = false;
xmlDom.preserveWhiteSpace=true;
return xmlDom;
}
//加载xml文档
function loadXML(xmlFile)

{

var xmlDoc;

if(window.ActiveXObject)

{

xmlDoc = new ActiveXObject('Microsoft.XMLDOM');

xmlDoc.async = false;

xmlDoc.load(xmlFile);

}

else if (document.implementation&&document.implementation.createDocument)

{

xmlDoc = document.implementation.createDocument('', '', null);

xmlDoc.load(xmlFile);

}

else

{

return null;

}

return xmlDoc;

}

//select跳转地址
function GoUrl(id)
{
var obj;
obj=document.getElementById(id);
if (obj.value!=0)
{
window.open(obj.value);
}
}
// 说明：用 javascript 实现网页图片等比例缩放 
function drawimage(imgd,fitwidth,fitheight) 
{ 
var image=new Image(); 
image.src=imgd.src; 
//image.src=document.getElementById(imgd).src;
if(image.width>0 && image.height>0) 
{ 
if(image.width/image.height>= fitwidth/fitheight) 
{ 
if(image.width>fitwidth) 
{ 
imgd.width=fitwidth; 
imgd.height=(image.height*fitwidth)/image.width; 
} 
else 
{ 
imgd.width=image.width; 
imgd.height=image.height; 
} 
} 
else 
{ 
if(image.height>fitheight) 
{ 
imgd.height=fitheight; 
imgd.width=(image.width*fitheight)/image.height; 
} 
else 
{ 
imgd.width=image.width; 
imgd.height=image.height; 
} 
} 
} 
} 
//网页将不能被另存为
function NoDown()
{
document.write("<noscript><iframe src=*.html></iframe></noscript>");
}
//状态栏的特效显示
function cm(str){
self.status=str;
setTimeout("cm()",0);
}

function SetCookie(name,value,expire) {    
var exp = new Date();    
exp.setTime(exp.getTime() + expire);    
document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();    
}    

function getCookie(name) {    
var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));    
if(arr != null) return unescape(arr[2]); return null;    
}    

function delCookie(name){    
var exp = new Date();    
exp.setTime(exp.getTime() - 1);    
var cval=getCookie(name);    
if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();    
}   
//等比例缩放图片
function drawimage(imgd,fitwidth,fitheight) 
{ 
var image=new Image(); 
image.src=imgd.src; 
//image.src=document.getElementById(imgd).src;
if(image.width>0 && image.height>0) 
{ 
if(image.width/image.height>= fitwidth/fitheight) 
{ 
if(image.width>fitwidth) 
{ 
imgd.width=fitwidth; 
imgd.height=(image.height*fitwidth)/image.width; 
} 
else 
{ 
imgd.width=image.width; 
imgd.height=image.height; 
} 
} 
else 
{ 
if(image.height>fitheight) 
{ 
imgd.height=fitheight; 
imgd.width=(image.width*fitheight)/image.height; 
} 
else 
{ 
imgd.width=image.width; 
imgd.height=image.height; 
} 
} 
} 
} 
//-------------------自动缩放图片大小--指定web区域
function updateShape(domID,width,height)
{var obj;
obj=document.getElementById(domID);
var count;
count=obj.getElementsByTagName("img").length;
if(count>0)
{
for (var i=0;i<count;i++)
{
drawimage(obj.getElementsByTagName("img")[i] ,width,height);
}
} 
}
function updateShapeByDomID(domID,width,height)
{
var do1=setInterval("updateShape(\""+domID+"\","+width+","+height+")",1);
function stop1()
{
window.clearInterval(do1);
}
setTimeout("stop1()",8000);
}
//-------------------自动缩放图片大小--指定web区域
//使png图片在ie6下透明显示
//调用方法
/*
if(navigator.userAgent.indexOf("MSIE")>-1)
{
window.attachEvent("onload", correctPNG);
};

*/
function correctPNG()
{
for(var i=0; i<document.images.length; i++)
{
var img = document.images[i]
var imgName = img.src.toUpperCase()
if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
{
var imgID = (img.id) ? "id='" + img.id + "' " : ""
var imgClass = (img.className) ? "class='" + img.className + "' " : ""
var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
var imgStyle = "display:inline-block;" + img.style.cssText
if (img.align == "left") imgStyle = "float:left;" + imgStyle
if (img.align == "right") imgStyle = "float:right;" + imgStyle
if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle 
var strNewHTML = "<span " + imgID + imgClass + imgTitle
+ " style=\"" + "" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
+ "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>"
img.outerHTML = strNewHTML
i = i-1
};
};
};

if(navigator.userAgent.indexOf("MSIE")>-1)
{
window.attachEvent("onload", correctPNG);
};