123
//1.滚动条到顶端的距离
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
//2.滚动条到左边的距离
var scrollLeft = document.documentElement.scrollLeft || document.body.ScrollLeft;
//3.byClassName的兼容(通过class获取指定的对象)
function byClassName(obj,className){
//判断是否支持byClassName方法
if(obj.getElementsByClassName){
//直接使用
return obj.getElementsByClassName(className);
}else{//不支持
//获取所有的标签
var eles = obj.getElementsByTagName("*");
var arr = [];
//获取每一个标签对象
for(var i = 0,len = eles.length;i < len;i++){
//判断每一个对象是否具有指定的className
if(eles[i].className === className){
arr.push(eles[i]);
}
}
return arr;
}
}
//4.获取元素对象中class属性值的兼容
function getClassValue(obj){
return obj.getAttribute('class') ? obj.getAttribute('class') : obj.getAttribute('className');
}
//5.获取非行内样式的兼容
function getStyle(obj,attr){
return obj.currentStyle ? obj.currentStyle[attr] : getComputedStyle(obj,1)[attr];
}
//6.获取事件对象的兼容
evt = evt || window.event;
//7.获取鼠标编码值得兼容
function getButton(evt){
var e = evt || window.event;
if(evt){
return e.button;
}else if(window.event){
switch(e.button){
case 1 : return 0;
case 4 : return 1;
case 2 : return 2;
}
}
}
//8.阻止事件冒泡的兼容
event.stopPropagation ? event.stopPropagation() : event.cancelBubble = true;
//9.获取键盘编码值onkeypress的兼容
event.keyCode || event.charCode || event.which;
//10.阻止超链接的默认行为的兼容
event.preventDefault ? event.preventDefault() : event.returnValue = false;
//11.添加事件监听的兼容
function addEventListener(obj,event,fn,bool){
if(obj.addEventListener){
obj.addEventListener(event,fn,bool);
}else if(obj.attachEvent){
obj.attachEvent('on' + event,fn);
}
}
//12.移除事件监听器的兼容
function removeEventListener(obj,event,fn, bool){
if(obj.removeEventListener){
obj.removeEventListener(event,fn,bool);
}else if(obj.detachEvent){
obj.detachEvent('on' + event,fn);
}
}
//13.获取事件源的兼容
var target = event.target || event.srcElement;