如何使用 Prototype.js 获取浏览器窗口的大小?

这是我的解决方案，它提供与 Firefox 中的 Web Developer 工具栏相同的值.

This is my solution that gives the same values as the Web Developer toolbar in Firefox.

var WindowSize = Class.create({
    width: function()
    {
        var myWidth = 0;
        if (typeof(window.innerWidth) == 'number')
        {
            //Non-IE
            myWidth = window.innerWidth;
        }
        else if (document.documentElement && document.documentElement.clientWidth)
        {
            //IE 6+ in 'standards compliant mode'
            myWidth = document.documentElement.clientWidth;
        }
        else if (document.body && document.body.clientWidth)
        {
            //IE 4 compatible
            myWidth = document.body.clientWidth;
        }
        return myWidth;
    },
    height: function()
    {
        var myHeight = 0;
        if (typeof(window.innerHeight) == 'number')
        {
            //Non-IE
            myHeight = window.innerHeight;
        }
        else if (document.documentElement && document.documentElement.clientHeight)
        {
            //IE 6+ in 'standards compliant mode'
            myHeight = document.documentElement.clientHeight;
        }
        else if (document.body && document.body.clientHeight)
        {
            //IE 4 compatible
            myHeight = document.body.clientHeight;
        }
        return myHeight;
    }
});