comm.js

这是超市系统·有SQL数据库·属于毕业设计

//制造阴影效果
function writeShadow(id, leftoffset, topoffset){
	var height = document.getElementById(id).offsetHeight;
	var width = document.getElementById(id).offsetWidth;
	var left = leftoffset;
	var top = topoffset;
	document.write('<div style=\"position:absolute; left:'+left+'px; top:'+top+'px; width:'+width+'px; height:'+height+'px; ');
	document.write('z-index:-1; background-color: #000000; layer-background-color: #000000; border: 1px none #000000;');
	document.write('filter:');
	document.write('Alpha(Opacity=20);\"></div>');
}

//制造阴影效果
function writeShadow2(id1, id2, leftoffset, topoffset){
	var height = document.getElementById(id1).offsetHeight;
	var width = document.getElementById(id1).offsetWidth;
	var left = leftoffset;
	var top = topoffset;
	document.write('<div id=\"'+id2+'\" style=\"position:absolute; left:'+left+'px; top:'+top+'px; width:'+width+'px; height:'+height+'px; ');
	document.write('z-index:-1; background-color: #000000; layer-background-color: #000000; border: 1px none #000000;');
	document.write('filter:');
	document.write('Alpha(Opacity=20);\"></div>');
}

//选择全部多选框
function selectAll(cbID,status){
  var chbox=document.getElementsByName(cbID);
  var myL=chbox.length;
  for(i=0;i<myL;i++){
    chbox[i].checked=status;
  }
}

//email地址有效性检测
function validateEmail(email){
  var emailStr = email;
  //或 var re=/^[\w.-]+@([0-9a-z][\w-]+\.)+[a-z]{2,3}$/i;
  //\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
  //http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
  var re=new RegExp("^[\\w.-]+@([0-9a-z][\\w-]+\\.)+[a-z]{2,3}$","i");
  if(re.test(emailStr)){
    return true;
  }
  else{
    return false;
  }
}

//去掉左空格
function LTrim(str){
  var i;
  for(i=0;i<str.length;i++){
    if(str.charAt(i)!=" "&&str.charAt(i)!="　"){
      break;
    }
  }
  str=str.substring(i,str.length);
  return str;
}
//去掉右空格
function RTrim(str){
  var i;
  for(i=str.length-1;i>=0;i--){
    if(str.charAt(i)!=" "&&str.charAt(i)!="　"){
      break;
    }
  }
  str=str.substring(0,i+1);
  return str;
}
//去掉两边空格
function Trim(str){
  return LTrim(RTrim(str));
}

//检查密码，只能为字母或数字
function CheckPassword(str){
  var rc=true;
  if (str+"" == "undefined" || str == null){
    rc=false;
  }
  else {
    for(i=0;i<str.length;i++){
      if(str.charAt(i)<'0'||(str.charAt(i)>'9' && str.charAt(i)<'A')||(str.charAt(i)>'Z' && str.charAt(i)<'a')||str.charAt(i)>'z'){
        rc= false;
        break;
      }
    }
  }
  return rc;
}

//检查用户名（中文，英文字母或数字）
function CheckUsername(str){
  var rc=true;
  if (str+"" == "undefined" || str == null){
    rc=false;
  }
  else {
    for(i=0;i<str.length;i++){
      if((str.charAt(i)<'0'||(str.charAt(i)>'9' && str.charAt(i)<'A')||(str.charAt(i)>'Z' && str.charAt(i)<'a')||str.charAt(i)>'z')&&!checkChinese(str.charAt(i))){
        rc= false;
        break;
      }
    }
  }
  return rc;
}

//检查输入参数是否为整数
function CheckInteger(str){
    var rc=true;
    if (str+"" == "undefined" || str == null){
            rc=false;
    }
    else{
        for(i=0;i<str.length;i++){
            if(i==0 && str.charAt(i)=='-'){
                    continue;
            }
          if(str.charAt(i)<'0' || str.charAt(i)>'9'){
          rc=false;
           break;
         }
        }
    }
    return rc;
}

//检查中文
function checkChinese(input){
  var re = /[\u4E00-\u9FA0]+/;
  if (re.test(input)){
    return true;
  }
  else{
    return false;
  }
}

function CheckNumber(str){
  var rc=true;
  if (str+"" == "undefined" || str == null){
    rc=false;
  }
  else if(str.length==0){
    rc=false;
  }
  else{
    for(i=0;i<str.length;i++){
      if(str.charAt(i)<'0' || str.charAt(i)>'9'){
        rc=false;
        break;
      }
    }
  }
  return rc;
}

//显示或隐藏某一元素，根据id值
function showHidden(id,disValue){
  document.getElementById(id).style.display=disValue;
}
//显示或隐藏某一元素，根据id值
function showHidden2(id){
  if(document.getElementById(id).style.display=='none'){
    document.getElementById(id).style.display='block';
  }
  else{
    document.getElementById(id).style.display='none';
  }
}

//更改当前窗口href
function changeHRef(url){
  window.location.href=url;
}

//选择目前选中的选项
function selectOption(id, value){
  var select = document.getElementById(id);
  for(i=0;i<select.options.length;i++){
    if(select.options[i].value==value){
      select.options[i].selected=true;
      break;
    }
  }
}

function selectRadio(id, value){
  var select = document.getElementById(id);
  alert(select);
//  for(i=0;i<select.options.length;i++){
//    if(select.options[i].value==value){
//      select.options[i].selected=true;
//      break;
//    }
//  }
}

function sendRequest(url){
  if (window.XMLHttpRequest) {
    xml = new XMLHttpRequest();
  }
  else if (window.ActiveXObject) {
    xml = new ActiveXObject("Microsoft.XMLHTTP");
  }
  xml.onreadystatechange = onStatusChange;
  xml.open("GET", url, true);
  xml.send(null);
}

function onStatusChange(){
  if (xml.readyState == 4){
    if (xml.status==200){
      onReadyDo();
    }
    else{
      alert( 'HTTP Error ' + xml.status + ': ' + xml.statusText);
    }
  }
}

////////////////第二个JAXA函数//////////////////
var gId;
function sendRequest2(id, url){
  gId = id;
  if (window.XMLHttpRequest) {
    xml = new XMLHttpRequest();
  }
  else if (window.ActiveXObject) {
    xml = new ActiveXObject("Microsoft.XMLHTTP");
  }
  xml.onreadystatechange = onStatusChange2;
  xml.open("GET", url, true);
  xml.send(null);
}

function onStatusChange2(){
  if (xml.readyState == 4){
    if (xml.status==200){
      document.getElementById(gId).innerHTML = xml.responseText;
    }
    else{
      alert('HTTP Error ' + xml.status + ': ' + xml.statusText);
    }
  }
}
////////////////结束 第二个JAXA函数//////////////////

////////////////第三个AJAX函数//////////////////
/**
 * XMLHttpRequest Object Pool
 *
 * @author    legend <[e-mail]>
 * @link      http://www.ugia.cn/?p=85
 * @Copyright www.ugia.cn
 */

var XMLHttp = {
    _objPool: [],

    _getInstance: function ()
    {
        for (var i = 0; i < this._objPool.length; i ++)
        {
            if (this._objPool[i].readyState == 0 || this._objPool[i].readyState == 4)
            {
                return this._objPool[i];
            }
        }

        // IE5中不支持push方法
        this._objPool[this._objPool.length] = this._createObj();

        return this._objPool[this._objPool.length - 1];
    },

    _createObj: function ()
    {
        if (window.XMLHttpRequest)
        {
            var objXMLHttp = new XMLHttpRequest();

        }
        else
        {
            var MSXML = ['Microsoft.XMLHTTP', 'MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];
            for(var n = 0; n < MSXML.length; n ++)
            {
                try
                {
                    var objXMLHttp = new ActiveXObject(MSXML[n]);
                    break;
                }
                catch(e)
                {
                }
            }
         }

        // mozilla某些版本没有readyState属性
        if (objXMLHttp.readyState == null)
        {
            objXMLHttp.readyState = 0;

            objXMLHttp.addEventListener("load", function ()
                {
                    objXMLHttp.readyState = 4;

                    if (typeof objXMLHttp.onreadystatechange == "function")
                    {
                        objXMLHttp.onreadystatechange();
                    }
                },  false);
        }

        return objXMLHttp;
    },

    // 发送请求(方法[post,get], 地址, 数据, 回调函数)
    sendReq: function (method, url, data, id, callback, charset)
    {
        var objXMLHttp = this._getInstance();

        with(objXMLHttp)
        {
            try
            {
                // 加随机数防止缓存
                if (url.indexOf("?") > 0)
                {
                    url += "&randnum=" + Math.random();
                }
                else
                {
                    url += "?randnum=" + Math.random();
                }

                open(method, url, true);
                // 设定请求编码方式
                setRequestHeader("Content-Type", "text/xml");
                setRequestHeader("charset", charset);
                //setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset='+charset);
                send(data);
                onreadystatechange = function ()
                {
                    if (objXMLHttp.readyState == 4 && (objXMLHttp.status == 200 || objXMLHttp.status == 304))
                    {
                        callback(objXMLHttp, id);
                    }
                }
            }
            catch(e)
            {
                alert(e);
            }
        }
    }
};

function changeInnerHTMLById(obj, id){
  if(document.getElementById(id)!=null){
    document.getElementById(id).innerHTML = obj.responseText;
  }
  else{
    parent.document.getElementById(id).innerHTML = obj.responseText;
  }
}

function sendRequest3(id, url){
  if(document.getElementById(id)!=null){
    document.getElementById(id).innerHTML = "<div align='center'><img src='/images/loading.gif'><br>正在读取……</div>";
  }
  else{
    parent.document.getElementById(id).innerHTML = "<div align='center'><img src='/images/loading.gif'><br>正在读取……</div>";
  }
  XMLHttp.sendReq('GET', url, '', id, changeInnerHTMLById, 'GBK');
}

function sendRequest5(id, url){
  if(document.getElementById(id)!=null){
    document.getElementById(id).innerHTML = "<div align='center'><img src='/images/loading.gif'><br>正在读取……</div>";
  }
  else{
    parent.document.getElementById(id).innerHTML = "<div align='center'><img src='/images/loading.gif'><br>正在读取……</div>";
  }
  XMLHttp.sendReq('GET', url, '', id, changeInnerHTMLById, 'GBK');
}

function sendRequest4(id, url, fun){
  if(document.getElementById(id)!=null){
    document.getElementById(id).innerHTML = "<div align='center'><img src='/images/loading.gif'><br>正在读取……</div>";
  }
  else{
    parent.document.getElementById(id).innerHTML = "<div align='center'><img src='/images/loading.gif'><br>正在读取……</div>";
  }
  XMLHttp.sendReq('POST', url, '', id, fun, 'GBK');
}
////////////////结束 第三个JAXA函数//////////////////

String.prototype.replaceAll = stringReplaceAll;

function stringReplaceAll(AFindText,ARepText){
  raRegExp = new RegExp(AFindText,"g")
  return this.replace(raRegExp,ARepText)
}

function preLoadImage(imgUrl){
  var heavyImage = new Image();
  heavyImage.src = imgUrl;
}


function showWindow(title, url){
  document.getElementById("windowTitle").innerHTML=title;
  document.getElementById("windowDiv").style.top=150;
  document.getElementById("windowDiv").style.left=document.body.clientWidth/2-200+document.body.scrollLeft;
  document.getElementById("windowDiv").style.display="block";
  sendRequest4("windowContent", url, changeShadowAndInnerHTML);
}


function closeWindow(){
  document.getElementById("windowDiv").style.display="none";
  hiddenDisableDiv();
}

function showDisableDiv(){
  //得到浏览器窗口的大小
  if(document.body.scrollHeight>document.body.clientHeight){
    document.getElementById("disDiv").style.height=document.body.scrollHeight;
  }
  else{
    document.getElementById("disDiv").style.height=document.body.clientHeight;
  }
  if(document.body.scrollWidth>document.body.clientWidth){
    document.getElementById("disDiv").style.width=document.body.scrollWidth;
  }
  else{
    document.getElementById("disDiv").style.width=document.body.clientWidth;
  }
  document.getElementById("disDiv").style.display="block";
}

function hiddenDisableDiv(){
  document.getElementById("disDiv").style.display="none";
}

function reshowShadow(id1, id2){
  document.getElementById(id2).style.width=document.getElementById(id1).offsetWidth;
  document.getElementById(id2).style.height=document.getElementById(id1).offsetHeight;
}

function changeShadowAndInnerHTML(obj, id){
  if(document.getElementById(id)!=null){
    document.getElementById(id).innerHTML = obj.responseText;
  }
  else{
    parent.document.getElementById(id).innerHTML = obj.responseText;
  }
  reshowShadow('windowDiv', 'windowShadow');
}

function resizeimg(ImgD,iwidth,iheight) {
     var image=new Image();
     image.src=ImgD.src;
     if(image.width>0 && image.height>0){
        if(image.width/image.height>= iwidth/iheight){
           if(image.width>iwidth){
               ImgD.width=iwidth;
               ImgD.height=(image.height*iwidth)/image.width;
           }else{
                  ImgD.width=image.width;
                  ImgD.height=image.height;
                }
               ImgD.alt=image.width+"×"+image.height;
        }
        else{
                if(image.height>iheight){
                       ImgD.height=iheight;
                       ImgD.width=(image.width*iheight)/image.height;
                }else{
                        ImgD.width=image.width;
                        ImgD.height=image.height;
                     }
                ImgD.alt=image.width+"×"+image.height;
            }
　　　　　ImgD.style.cursor= "pointer"; //改变鼠标指针
　　　　　ImgD.onclick = function() { window.open(this.src);} //点击打开大图片
　　　　if (navigator.userAgent.toLowerCase().indexOf("ie") > -1) { //判断浏览器，如果是IE
　　　　　　ImgD.title = "请使用鼠标滚轮缩放图片，点击图片可在新窗口打开";
　　　　　　ImgD.onmousewheel = function img_zoom() //滚轮缩放
　　　　　 {
　　　　　　　　　　var zoom = parseInt(this.style.zoom, 10) || 100;
　　　　　　　　　　zoom += event.wheelDelta / 12;
　　　　　　　　　　if (zoom> 0)　this.style.zoom = zoom + "%";
　　　　　　　　　　return false;
　　　　　 }
　　　  } else { //如果不是IE
　　　　　　　     ImgD.title = "点击图片可在新窗口打开";
　　　　　　   }
    }
}

function resizeimg2(ImgD,iwidth,iheight) {
     var image=new Image();
     image.src=ImgD.src;
     if(image.width>0 && image.height>0){
        if(image.width/image.height>= iwidth/iheight){
           if(image.width>iwidth){
               ImgD.width=iwidth;
               ImgD.height=(image.height*iwidth)/image.width;
           }else{
                  ImgD.width=image.width;
                  ImgD.height=image.height;
                }
               ImgD.alt=image.width+"×"+image.height;
        }
        else{
                if(image.height>iheight){
                       ImgD.height=iheight;
                       ImgD.width=(image.width*iheight)/image.height;
                }else{
                        ImgD.width=image.width;
                        ImgD.height=image.height;
                     }
                ImgD.alt=image.width+"×"+image.height;
       }
    }
}