//$等同于document.getElementById();
function $() {
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string')
element = document.getElementById(element);
if (arguments.length == 1)
return element;
elements.push(element);
}
return elements;
}
//$T等同于document.getElementsByTagName();
function $T(tagStr){
if(tagStr != null){
var elements = new Array();
elements = document.getElementsByTagName(tagStr);
return elements;
}
return false;
}
//$N等同于document.getElementsByName();
function $N(nameStr){
if(nameStr != null){
var elements = new Array();
elements = document.getElementsByName(nameStr);
return elements;
}
return false;
}
/*字符串操作
*1.去除字符串中的所有空格*/
String.prototype.trim = function(){
var space = new RegExp(" ","g");
var newStr = this.replace(space,"");
return newStr;
}
//2.判断字符串是否为数字
String.prototype.isNum = function (){
return (!isNaN(this));
}
//3.判断字符串是否为浮点数
String.prototype.isFloat = function (){
if(!(isNotaNumber(this))) return false;
return (!isNaN(parseFloat(this))) ? true : false;
}
//4.判断字符串是否为有效的Email地址
String.prototype.isEmail = function (){
return(new RegExp(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/).test(this));
}
/*--------输入框的相关操作--------------------------------------------
* inputObj对象，主要功能用于构造input.type=text(输入框)对象;
* 调用方法:
* var obj = new inputObj('Id')
* 参数说明:
* id: input输入框的id值;
* 注意：参数要加上双引号或单引号;
* 判断为空：obj.isNull,返回T或F;
*
----------------------------------------------------*/
function inputObj(objId){
this.idStr = objId;
var obj = $(this.idStr);
this.value = function (){return $(this.idStr).value;}
this.proto = obj;
//this.seeProto = function(){for(x in this.proto) alert( x + "-" + this.proto[x]);}
this.isNull = function(){
if(this.value()=="" || (this.value().trim().length < 1))
return true;
return false;
}
}
/*----------------------------------------------------
* checkBox方法，主要功能用于全选;
* 调用方法:
*
* 参数说明:
* name: 要全选对象的name值;
* id: 点击复选框实现全选对象的功能的id值;
* 注意：参数要加上双引号或单引号;
*
* 实例：
*
*
*
*
*
*
----------------------------------------------------*/
function checkBox(name,id){
var boxArray = $N(name);
var checkObj = $(id);
var statu = new status();
checkObj.onclick = function (){
for(var i = 0; i < boxArray.length; i++)
boxArray[i].checked = this.checked;
}
for(var i = 0; i < boxArray.length; i++){
boxArray[i].onclick = function (){
if (this.checked) {
if(statu.state()) checkObj.checked = true;
}else{
checkObj.checked = false;
}
}
}
function status(){
this.state = function (){
for(var i = 0; i < boxArray.length; i++){
if (!(boxArray[i].checked)){
return false;
}
}
return true;
}
}
}
/*----------------------------------------------------
* isChk（）方法，主要功能用于判断是否选择了复选框;
* 调用方法:
* isChk(chkName)
* 参数说明:
* chkName: 复选框的name值;
* 若选择了复选择则返回True，反之返回False;
* 注意：参数要加上双引号或单引号;
*
----------------------------------------------------*/
function isChk(chkName){
var chkObj = $N(chkName);
for(var i = 0; i < chkObj.length; i++){
if( chkObj[i].checked ) return true;
}
return false;
}
/*-----检查是否选择了下拉菜单------------
* isSelect（）方法，主要功能用于检查是否选择了下拉菜单的选项;
* 调用方法:
* isSelect(selectId)
* 参数说明:
* selectId: 下拉菜单的Id值;
* 若选择了则返回True，反之返回False;
* 注意：参数要加上双引号或单引号;
---------------------------------------*/
function isSelect(selectId){
var obj = $(selectId);
if(obj.options[0].selected == true) return false;
return true;
}
/*-----返回下拉菜单中选中的值------------
* $SelectValue（）方法，主要功能用于返回指定下拉菜单中选中项的value;
* 调用方法:
* $SelectValue(str,state)
* 如果按下拉菜单的Name名：则方法如：$SelectValue('selectName');
* 如果按下拉菜单的Id名：则方法如：$SelectValue('selectId',id);
* 参数说明:
* str: 可以是下拉菜单的Id或name;
* state:用来告诉函数所传的是Id还是Name;一个标识的作用;
* 返回下拉菜单当前选项的value;
* 注意：参数str要加上双引号或单引号;
---------------------------------------*/
function $SelectValue(str,state){
if (state != null)
{
var sObj = $(str);
}else{
var sObj = $N(str)[0];
}
//alert(sObj.options[sObj.options.selectedIndex].value);
return sObj.options[sObj.options.selectedIndex].value;
}
//关闭窗口
function winclose(){
window.close();
}
/*打开新窗口，等同于window.open()方法
例：windowopen(‘../***.do’)
----------------------------------*/
function windowopen( url, winName){
width = 1024;
height = 768;
xposition=0; yposition=0;
if(winName == null) winName = "";
if ((parseInt(navigator.appVersion) >= 4 ))
{
xposition = (screen.width - width) / 2;
yposition = (screen.height - height) / 2;
}
theproperty= "width=" + width +","
+ "height="+height+","
+ "location=0,"
+ "menubar=0,"
+ "resizable=1,"
+ "scrollbars=1,"
+ "status=0,"
+ "titlebar=0,"
+ "toolbar=0,"
+ "hotkeys=0,"
+ "screenx=" + xposition + ","
+ "screeny=" + yposition + "," /
+ "left=" + xposition + ","
try{
window.open( url,winName,theproperty );
}catch(e){
alert("打开窗口失败！");
}
}
//
/*控制弹出窗口大小，等同于window.open()方法
例：windowopen(‘../***.do’，width , height)
----------------------------------*/
function windowopen( url, width , height){
if(width == null) width = 1024;
if(height == null) height = 768;
xposition=0; yposition=0;
if ((parseInt(navigator.appVersion) >= 4 ))
{
xposition = (screen.width - width) / 2;
yposition = (screen.height - height) / 2;
}
theproperty= "width=" + width +","
+ "height="+height+","
+ "location=0,"
+ "menubar=0,"
+ "resizable=1,"
+ "scrollbars=1,"
+ "status=0,"
+ "titlebar=0,"
+ "toolbar=0,"
+ "hotkeys=0,"
+ "screenx=" + xposition + ","
+ "screeny=" + yposition + "," /
+ "left=" + xposition + ","
try{
window.open( url,'new',theproperty );
}catch(e){
alert("打开窗口失败！");
}
}
//地址转向
function gotoURL(urlStr){
document.location.href = urlStr;
}
function viewphoto(mypic,imgfile) {
if (imgfile.value){
mypic.src=imgfile.value;
mypic.style.display="";
mypic.border=1;
}
}
//用按钮来实现全选
function checkAll(name){
var boxArray = $N(name);
for(var i = 0; i < boxArray.length; i++)
boxArray[i].checked = true;
}
//用按钮来实现取消全选
function checkNone(name){
var boxArray = $N(name);
for(var i = 0; i < boxArray.length; i++)
boxArray[i].checked = false;
}
//
function allSelect(nameStr){
var sObj = $N(nameStr)[0];
for(var i = 0;i < sObj.length;i++)
sObj[i].selected = true;
}
//
function calSelect(nameStr){
var sObj = $N(nameStr)[0];
for(var i = 0;i < sObj.length;i++)
sObj[i].selected = false;
}
function del(promptStr){
if(promptStr == null || promptStr == "") promptStr = "Are you delete?";
if(confirm(promptStr)){
return true;
}else{
return false;
}
}
function isEmpty(str){
if(str.length==0){
return true
}else if(jsTrim(str).length==0){
return true;
}
return false;
}
//=============================================
//Trim left spaces
//=============================================
function jsLTrim(str){
var rtnStr = "";
for (var i=0; i=0;i--){
if (str.charAt(i)!=" ") {
rtnStr=str.substring(0,i+1);
break;
}
}
return rtnStr;
}
//==========================================
//Purpose: Trim both left and right spaces
//==========================================
function jsTrim(str){
return(jsLTrim(jsRTrim(str)));
}