擷取視窗 高 、寬 的JS代碼

來源:互聯網
上載者:User
var getViewPortWidth = function(){    var width = 0;    if ((document.documentElement) && (document.documentElement.clientWidth))    {        width = document.documentElement.clientWidth;    }    else if ((document.body) && (document.body.clientWidth))    {        width = document.body.clientWidth;    }    else if (window.innerWidth)    {        width = window.innerWidth;    }    return width;};var getViewPortHeight = function(){    var height = 0;    if (window.innerHeight)    {        height = window.innerHeight - 18;    }    else if ((document.documentElement) && (document.documentElement.clientHeight))    {        height = document.documentElement.clientHeight;    }    return height;};var getContentHeight = function(){    if ((document.body) && (document.body.offsetHeight))    {        return document.body.offsetHeight;    }    return 0;};var getViewPortScrollX = function(){    var scrollX = 0;    if ((document.documentElement) && (document.documentElement.scrollLeft))    {        scrollX = document.documentElement.scrollLeft;    }    else if ((document.body) && (document.body.scrollLeft))    {        scrollX = document.body.scrollLeft;    }    else if (window.pageXOffset)    {        scrollX = window.pageXOffset;    }    else if (window.scrollX)    {        scrollX = window.scrollX;    }    return scrollX;};var getViewPortScrollY = function(){    var scrollY = 0;    if ((document.documentElement) && (document.documentElement.scrollTop))    {        scrollY = document.documentElement.scrollTop;    }    else if ((document.body) && (document.body.scrollTop))    {        scrollY = document.body.scrollTop;    }    else if (window.pageYOffset)    {        scrollY = window.pageYOffset;    }    else if (window.scrollY)    {        scrollY = window.scrollY;    }    return scrollY;};

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