Jquery author John Resig's own encapsulated javascript common functions_javascript skills

Copy code The code is as follows:

//Get the style value of the element.
function getStyle(elem,name){
if(elem.style[name]){
return elem.style[name];
}else if(elem.currentStyle){
return elem.currentStyle[name];
}else if(document.defaultView&&document.defaultView.getComputedStyle){
name=name.replace(/([A-Z])/g,”-$1″);
name=name.toLowerCase();
var s=document.defaultView.getComputedStyle(elem,"");
return s&&s.getPropertyValue(name);
}else{
return null
}
}
//Get the x and y coordinates of the element relative to this page.
function pageX(elem){
return elem.offsetParent?(elem.offsetLeft pageX(elem.offsetParent)):elem.offsetLeft;
}
function pageY(elem){
return elem.offsetParent?(elem.offsetTop pageY(elem.offsetParent)):elem.offsetTop;
}
//Get the x and y coordinates of the element relative to the parent element.
function parentX(elem){
return elem.parentNode==elem.offsetParent?elem.offsetLeft:pageX(elem)-pageX(elem.parentNode);
}
function parentY(elem) {
return elem.parentNode==elem.offsetParent?elem.offsetTop:pageY(elem)-pageY(elem.parentNode);
}
//Get the x and y coordinates of the element positioned using css .
function posX(elem){
return parseInt(getStyle(elem,”left”));
}
function posY(elem){
return parseInt(getStyle(elem,”top ”));
}
//Set the element position.
function setX(elem,pos){
elem.style.left=pos ”px”;
}
function setY(elem,pos){
elem.style.top=pos "px";
}
//Increase the X and y coordinates of the element.
function addX(elem,pos){
set(elem,(posX(elem) pos));
}
function addY(elem,pos){
set(elem,( posY(elem) pos));
}
//Get the height and width of the element using css to control the size
function getHeight(elem){
return parseInt(getStyle(elem,"height") );
}
function getWidth(elem){
return parseInt(getStyle(elem,"width"));
}
//Get element possible, complete height and width
function getFullHeight(elem){
if(getStyle(elem,”display”)!=”none”){
return getHeight(elem)||elem.offsetHeight;
}else{
var old=resetCss(elem,{display:”block”,visibility:”hidden”,position:”absolute”});
var h=elem.clientHeight||getHeight(elem);
restoreCss( elem,old);
return h;
}
}
function getFullWidth(elem){
if(getStyle(elem,”display”)!=”none”){
return getWidth(elem)||elem.offsetWidth;
}else{
var old=resetCss(elem,{display:”block”,visibility:”hidden”,position:”absolute”});
var w=elem.clientWidth||getWidth(elem);
restoreCss(elem,old);
return w;
}
}
//Set css and save the old css
function resetCss(elem,prop){
var old={};
for(var i in prop){
old[i]=elem.style[i];
elem.style[i]=prop[i];
}
return old;
}
function restoreCss(elem,prop){
for(var i in prop){
elem.style[i]=prop[i];
}
}
//Show and hide
function show(elem){
elem.style.display=elem. $oldDisplay||” “;
}
function hide(elem){
var curDisplay=getStyle(elem,”display”);
if(curDisplay!=”none”){
elem.$oldDisplay=curDisplay;
elem.style.display=”none”;
}
}
//Set transparency
function setOpacity(elem,num){
if(elem.filters){
elem.style.filter=”alpha(opacity=” num ”)”;
}else{
elem.style.opacity=num/100;
}
}
//Slide
function slideDown(elem){
var h=getFullHeight(elem);
elem.style.height=”0px”;
show(elem) ;
for(var i=0;i<=100;i =5){
new function(){
var pos=i;
setTimeout(function(){elem.style. height=(pos/100*h) ”px”;},(pos*10));
}
}
}
//Gradient
function fadeIn(elem){
show(elem);
setOpacity(elem,0);
for(var i=0;i<=100;i =5){
new function(){
var pos =i;
setTimeout(function(){setOpacity(elem,pos);},(pos 1)*10);
}
}
}
//Get the mouse cursor relative position on the entire page.
function getX(e){
e=e||window.event;
return e.pageX||e.clientX document.body.scrollLeft;
}
function getY(e ){
e=e||window.event;
return e.pageY||e.clientY document.body.scrollTop;
}
//Get the position of the mouse cursor relative to the current element .
function getElementX(e){
return (e&&e.layerX)||window.event.offsetX;
}
function getElementY(e){
return (e&&e.layerY)|| window.event.offsetY;
}
//Get the height and width of the page
function getPageHeight(){
var de=document.documentElement;
return document.body.scrollHeight|| (de&&de.scrollHeight);
}
function getPageWidth(){
var de=document.documentElement;
return document.body.scrollWidth||(de&&de.scrollWidth);
}
//Get the position of the scroll bar.
function scrollX(){
var de=document.documentElement;
return self.pageXOffset||(de&&de.scrollLeft)||document.body.scrollLeft;
}
function scrollY(){
var de=document.documentElement;
return self.pageYOffset||(de&&de.scrollTop)||document.body.scrollTop;
}
//获取视口的高度和宽度。
function windowHeight() {
var de = document.documentElement;
return self.innerHeight||(de && de.offsetHeight)||document.body.offsetHeight;
}
function windowWidth() {
var de = document.documentElement;
return self.innerWidth||( de && de.offsetWidth )||document.body.offsetWidth;
}