惯用js总结

/*
* 查询字符串加密,服务端仅解密一次
*/
function uriEncode(param){
return encodeURI(encodeURI(param));
}

/*
* 查询字符串解密
*/
function uriDecode(param){
return decodeURI(decodeURI(param));
}

/*
* 输入框 特殊限制 仅限数字
*/
function limitNumber(obj){
obj.value=obj.value.replace(/[\D]/g,'');
}

/*
* 输入框 特殊限制 仅限字母数字下划线
*/
function limitNoOther(obj){
obj.value=obj.value.replace(/[\W]/g,'');
}

/*
* 输入框 特殊限制 仅限非英文,特殊字符
*/
function limitOther(obj){
obj.value=obj.value.replace(/[^\W]/g,'');
}

/*
* 输入框 特殊限制 仅限非数字
*/
function limitNaN(obj){
obj.value=obj.value.replace(/[^\D]/g,'');
}

/*
* 限定长度
*/
function limitLength(obj,maxLength){
obj.value=obj.value.substring(0,maxLength);
}

/*
* 限制 窗口大小
*/
function keepWidth(width,height){
var obody=document.body;
if(obody.clientWidth<width){
window.resizeTo(width,height);
}
}

/*
* 限制 顶层窗口
*/
function lonely(){
if(top!=self){
top.location.href=window.location.href;
}
}

/*
* 字符串操作去空格
*/
String.prototype.Trim=function(){
return this.replace(/(^\s*)|(\s*$)/g,"");
}

String.prototype.LTrim = function(){
return this.replace(/(^\s*)/g, "");
}

String.prototype.RTrim = function(){
return this.replace(/(\s*$)/g, "");
}

/**
* DIV滚动方法(obj,scrollAble,outlineAble,tobj)
* 1.div对象id
* 2.是否随屏滚动(0,1)[false,true]
* 3.是否可以出界(0,1)[false,true]
* 4.控制div的 title对象[一般为表头或tr]
*/
function simpleDrag(obj,scrollAble,outlineAble,tobj){
if(!obj || typeof obj == "undefined"){
return;
}
var oZIndex=0;
var oldX,oldY;//老的 clientX,clientY
var oldLeft,oldTop; //老的pixelLeft,pixelTop
var scrollX,scrollY;//老的 左边距
var isMove=false;
if(typeof(tobj)=="undefined"||!tobj){
tobj=obj;
}
tobj.onmouseup=function(){clear();}
tobj.onmousedown=function(){init();}
var init = function(){ //准备移动
/*移动的时候是否可选中内容*/
oZIndex=obj.style.zIndex;
obj.style.zIndex=10000;
oldX=EV.clientX();
oldY=EV.clientY();
var left=obj.style.left;
var top=obj.style.top;
oldLeft=parseInt(left?left:0);
oldTop=parseInt(top?top:0);
tobj.style.cursor="move";
document.onmousemove=function(){move();}
}
/*开始移动*/
var move = function(){
tobj.setCapture?tobj.setCapture(true) : document.captureEvents(EV.MOUSEDOWN);
isMove=false;
if(EV.button()==1){
isMove=true;
}
if(isMove){
try{
obj.style.left=(oldLeft+EV.clientX()-oldX)+"px";
obj.style.top=(oldTop+EV.clientY()-oldY)+"px";
}catch(e){}
scrollX=parseInt(obj.style.left)-parseInt(document.body.scrollLeft);
scrollY=parseInt(obj.style.top)-parseInt(document.body.scrollTop);
if(outlineAble){//不出界
var pl=obj.style.left;
var pt=obj.style.top;
if(pl<=0){
obj.style.left=0;
}
if(pt<=0){
obj.style.top=0;
}
}
}
}
/*清场*/
var clear=function(){
tobj.releaseCapture?tobj.releaseCapture() : document.releaseEvents(EV.MOUSEDOWN);
document.onmousemove=function(){return false};
tobj.onmousemove=function(){return false};
obj.style.zIndex=oZIndex;
obj.style.cursor="normal";
EV.stopPropagation();
}
if(scrollAble){
window.onscroll=function(){
obj.style.left=scrollX+document.body.scrollLeft;
obj.style.top=scrollY+document.body.scrollTop;
}
}


}

/*
* event函数集合
* @class event对象
*/
function EV(){}
EV.getTarget = fGetTarget;//获取target,获取 事件源 ie:srcElement,firefox:target
EV.getEvent = fGetEvent;//获取event
EV.stopEvent = fStopEvent;//取消事件和事件冒泡
EV.stopPropagation = fStopPropagation;//取消事件冒泡
EV.preventDefault = fPreventDefault;//取消事件
EV.button= fGetButton;//获取点击的button

EV.addEvent=function(obj,sEvent,fpNotify){
if(obj.addEventListener){
sEvent=sEvent.substring(sEvent.indexOf("on")+2);
obj.addEventListener(sEvent,fpNotify,false);
}else{
obj.attachEvent(sEvent,fpNotify);
}
}

/*移除事件*/
EV.removeEvent=function(obj,sEvent,fpNotify){
if(obj.removeEventListener){
sEvent=sEvent.substring(sEvent.indexOf("on")+2)
obj.removeEventListener(sEvent,fpNotify,false);
}else{
obj.detachEvent(sEvent,fpNotify);
}
}

/*获取点击位置*/
EV.clientX=function(){
var ev=this.getEvent();
var x=ev.clientX || ev.pageX;
return parseInt(x);
}
/*获取点击位置*/
EV.clientY=function(){
var ev=this.getEvent();
var y=ev.clientY || ev.pageY;
return parseInt(y);
}

/*获取点击的button*/
function fGetButton(ev){
if(!ev) ev = this.getEvent();
if(!ev.which&&ev.button){//ie
return ev.button&1?1:(ev.button&2?3:(ev.button&4?2:0))
}
return ev.which;
}

/*获取target,获取 事件源 ie:srcElement,firefox:target*/
function fGetTarget(ev, resolveTextNode){
if(!ev) ev = this.getEvent();
var t = ev.target || ev.srcElement;
if (resolveTextNode && t && "#text" == t.nodeName) {
return t.parentNode;
}else{
return t;
}
}

/*获取event*/
function fGetEvent(e){
var ev = e || window.event;
if (!ev) {
var c = this.getEvent.caller;
while (c) {
ev = c.arguments[0];
if (ev && Event == ev.constructor) {
break;
}
c = c.caller;
}
}
return ev;
}

/*取消事件和事件冒泡*/
function fStopEvent(ev) {
if(!ev) ev = this.getEvent();
this.stopPropagation(ev);
this.preventDefault(ev);
}

/*取消事件冒泡*/
function fStopPropagation(ev) {
if(!ev) ev = this.getEvent();
if (ev.stopPropagation) {
ev.stopPropagation();
} else {
ev.cancelBubble = true;
}
}

/*取消事件*/
function fPreventDefault(ev) {
if(!ev) ev = this.getEvent();
if (ev.preventDefault) {
ev.preventDefault();
} else {
ev.returnValue = false;
}
}

/*
* 日历 返回数据格式如:0909
*/
function showCalendar(){
var value= window.showModalDialog("../rili.htm","","dialogHeight:220px;dialogWidth:192px");
if(typeof(value)=="undefined"){
var date=new Date();
var month=(date.getMonth()+1);
var day=date.getDate();
day=day.length==1?"0"+day:day;
value=month+""+day;
value=value.length==3?"0"+value:value;
}
return value;
}

/*
* div日历,兼容ie,firefox
*/
function showCalendarD(layer,inputID){
if(layer.style.display="none")
layer.style.display="";
else
layer.style.display="none";
window.dateFrame.document.getElementById("layer").value=inputID;
}

/*
* 根据字符串获取json,str内部字符串不能有双引号
*/
function getJson(str){
return eval("("+str+")");
}
/*
* 全选ByName
*/
function chooseAll(name){
var objs=document.getElementsByName(name);
if(event.srcElement.checked){
for(i=0;i<objs.length;i++){
if(objs[i].disabled==false)
objs[i].checked=true;
}
}else{
for(i=0;i<objs.length;i++){
if(objs[i].disabled==false)
objs[i].checked=false;
}
}
}

/*
* 提示出错信息
*/
function showAlert(span,info){
document.getElementById(span).innerHTML=info;
}
/*
* 不提示出错信息
*/
function hiddenAlert(span){
document.getElementById(span).innerHTML="";
}

/*
* 替换全部
*/
function ReplaceAll(strOrg, strFind, strReplace) {
var index = 0;
while (strOrg.indexOf(strFind, index) != -1) {
strOrg = strOrg.replace(strFind, strReplace);
index = strOrg.indexOf(strFind, index);
}
return strOrg;
}

/*
* 根据id获取对象
*/
function $(id){return document.getElementById(id);}

/*
* 根据name获取对象数组
* ie8,只可通过name中表单元素,非表单找不到
*/
function $$(name){return document.getElementsByName(name);}

/*
*根据标签名获得对象
*/
function $$$(tagName){return document.getElementsByTagName(tagName);}

/*
* 控制页面中下拉框是否显示
*/
function ctrlSelect(isShow){
var ss = $$$("select");
for(var i=0;i<ss.length;i++){
var one = ss[i];
if(false == isShow){
one.style.visibility = "hidden";
}else{
one.style.visibility = "visible";
}
}
}