自己封装的常用javascript函数分享

都是些常用的功能，这里就不多废话了，小伙伴们自己看下就明白了

奉上代码：

//cookie

function setCookie(name, value, iDay)

{

    if(iDay!==false)

    {

        var oDate=new Date();

        oDate.setDate(oDate.getDate()+iDay);

        document.cookie=name+'='+value+';expires='+oDate+';path=/';

    }

    else

    {

        document.cookie=name+'='+value;

    }

}

function getCookie(name)

{

    var arr=document.cookie.split('; ');

    var i=0;

    for(i=0;i<arr.length;i++)

    {

        var arr2=arr[i].split('=');

        if(arr2[0]==name)

        {

            return arr2[1];

        }

    }

    return '';

}

function removeCookie(name)

{

    setCookie(name, 'a', -1);

}

//事件

function myAddEvent(obj, ev, fn){

    obj.attachEvent?obj.attachEvent('on'+ev, fn):obj.addEventListener(ev, fn, false);

}

function myDelEvent(obj, ev, fn){

    obj.detachEvent?obj.detachEvent('on'+ev, fn):obj.removeEventListener(ev, fn, false);

}

function getByClass(oParent, sClass)

{

    var aEle=oParent.getElementsByTagName('*');

    var re=new RegExp('\\b'+sClass+'\\b', 'i');

    var aResult=[];

    for(var i=0;i<aEle.length;i++)

    {

        if(re.test(aEle[i].className))

        {

            aResult.push(aEle[i]);

        }

    }

    return aResult;

}

function bindEvent(obj, ev, fn)

{

    obj.addEventListener?obj.addEventListener(ev, fn, false):obj.attachEvent('on'+ev, fn);

}

function unbindEvent(obj, ev, fn)

{

    obj.removeEventListener?obj.removeEventListener(ev, fn, false):obj.detachEvent('on'+ev, fn);

}

//生成随机数

function rnd(n, m)

{

    return Math.random()*(m-n)+n;

}

function time2date(t)

{

    function d(n){return n<10?'0'+n:''+n;}

    var oDate=new Date(t*1000);

    return oDate.getFullYear()+'-'+d(oDate.getMonth()+1)+'-'+d(oDate.getDate())+' '+d(oDate.getHours())+':'+d(oDate.getMinutes())+':'+d(oDate.getSeconds());

}

function time2day(t)

{

    function d(n){return n<10?'0'+n:''+n;}

    var oDate=new Date(t*1000);

    return oDate.getFullYear()+'-'+d(oDate.getMonth()+1)+'-'+d(oDate.getDate());

}

//拖拽

function drag(objEv, objMove, fnMoveCallBack)

{

    var disX=0,disY=0;

    objEv.onmousedown=function (ev)

    {

        var oEvent=ev||event;

        disX=(document.documentElement.scrollLeft||document.body.scrollLeft)+oEvent.clientX-objMove.offsetLeft;

        disY=(document.documentElement.scrollTop||document.body.scrollTop)+oEvent.clientY-objMove.offsetTop;

        if(objEv.setCapture)

        {

            objEv.onmousemove=fnMove;

            objEv.onmouseup=fnUp;

            objEv.setCapture();

        }

        else

        {

            document.onmousemove=fnMove;

            document.onmouseup=fnUp;

            return false;

        }

    };

    function fnMove(ev)

    {

        var oEvent=ev||event;

        var l=(document.documentElement.scrollLeft||document.body.scrollLeft)+oEvent.clientX-disX;

        var t=(document.documentElement.scrollTop||document.body.scrollTop)+oEvent.clientY-disY;

        fnMoveCallBack(l,t);

    }

    function fnUp()

    {

        this.onmousemove=null;

        this.onmouseup=null;

        if(this.releaseCapture)this.releaseCapture();

    }

}

function mouseScroll(obj, fnCallBack)

{

    bindEvent(obj, 'mousewheel', fnScroll);

    bindEvent(obj, 'DOMMouseScroll', fnScroll);

    function fnScroll(ev)

    {

        var oEvent=ev||event;

        var bDown;

        if(oEvent.wheelDelta)

        {

            bDown=oEvent.wheelDelta<0;

        }

        else

        {

            bDown=oEvent.detail>0;

        }

        fnCallBack(bDown);

        if(oEvent.preventDefault)oEvent.preventDefault();

        return false;

    }

}

//摆动运动

zns.site.fx.swing=function (obj, cur, target, fnDo, fnEnd, acc)

{

    if(zns.site.fx.browser_test.IE6)

    {

        fnDo&&fnDo.call(obj, target);

        fnEnd&&fnEnd.call(obj, target);

        return;

    }

    if(!acc)acc=0.1;

    var now={};

    var x=0;    //0-100

    if(!obj.__swing_v)obj.__swing_v=0;

    if(!obj.__last_timer)obj.__last_timer=0;

    var t=new Date().getTime();

    if(t-obj.__last_timer>20)

    {

        fnMove();

        obj.__last_timer=t;

    }

    clearInterval(obj.timer);

    obj.timer=setInterval(fnMove, 20);

    function fnMove(){

        if(x<50)

        {

            obj.__swing_v+=acc;

        }

        else

        {

            obj.__swing_v-=acc;

        }

        //if(Math.abs(obj.__flex_v)>MAX_SPEED)obj.__flex_v=obj.__flex_v>0?MAX_SPEED:-MAX_SPEED;

        x+=obj.__swing_v;

        //alert(x+','+obj.__swing_v);

        for(var i in cur)

        {

            now[i]=(target[i]-cur[i])*x/100+cur[i];

        }

        if(fnDo)fnDo.call(obj, now);

        if(/*Math.abs(obj.__swing_v)<1 || */Math.abs(100-x)<1)

        {

            clearInterval(obj.timer);

            if(fnEnd)fnEnd.call(obj, target);

            obj.__swing_v=0;

        }

    }

};

//弹性运动

zns.site.fx.flex=function (obj, cur, target, fnDo, fnEnd, fs, ms)

{

    if(zns.site.fx.browser_test.IE6)

    {

        fnDo&&fnDo.call(obj, target);

        fnEnd&&fnEnd.call(obj, target);

        return;

    }

    var MAX_SPEED=16;

    if(!fs)fs=6;

    if(!ms)ms=0.75;

    var now={};

    var x=0;    //0-100

    if(!obj.__flex_v)obj.__flex_v=0;

    if(!obj.__last_timer)obj.__last_timer=0;

    var t=new Date().getTime();

    if(t-obj.__last_timer>20)

    {

        fnMove();

        obj.__last_timer=t;

    }

    clearInterval(obj.timer);

    obj.timer=setInterval(fnMove, 20);

    function fnMove(){

        obj.__flex_v+=(100-x)/fs;

        obj.__flex_v*=ms;

        if(Math.abs(obj.__flex_v)>MAX_SPEED)obj.__flex_v=obj.__flex_v>0?MAX_SPEED:-MAX_SPEED;

        x+=obj.__flex_v;

        for(var i in cur)

        {

            now[i]=(target[i]-cur[i])*x/100+cur[i];

        }

        if(fnDo)fnDo.call(obj, now);

        if(Math.abs(obj.__flex_v)<1 && Math.abs(100-x)<1)

        {

            clearInterval(obj.timer);

            if(fnEnd)fnEnd.call(obj, target);

            obj.__flex_v=0;

        }

    }

};