TableWidget , 固定表头的一个js插件

公司项目里面很多地方都需要用到,出列表的时候固定表头，滚动表体

思路就是动态创建一个div,然后里面创建2个div,一个title,一个body

然后用clone的方法，分别处理2个div的内容

使用说明: var tableWidget = new TableWidget("TableID", "DestID", "100%", "300px");
tableWidget.change();
表格需要固定宽度，table 需要加 style="table-layout: fixed;"

/*
* 函数名称: Widget
* 作    者: yithcn
* 功能说明: 固定表格头，表体可以滚动

* 创建日期: 2010.10.13
*/
function TableWidget(table, dest, width, height) {
    this.construct(table, dest, width, height);
};

TableWidget.prototype = {
    table: null,
    dest: null,
    widht: null,
       tdiv: null,
    bdiv: null,
    create: function() {
        var that = this;
        var div = document.createElement("div");
        div.style.cssText = "background-color:white;width:" + that.width;
        that.dest.appendChild(div);
        //title
        var titlediv = document.createElement("div");
        titlediv.style.cssText = "width:100%;";
        div.appendChild(titlediv);
        //body
        var bodydiv = document.createElement("div");
        bodydiv.style.cssText = "overflow:auto;";
        bodydiv.appendChild(that.table);
        div.appendChild(bodydiv);

        var newtable = that.table.cloneNode(true);
        var len = newtable.rows.length;
        for (var i = len - 1; i > 0; i--) {
            newtable.deleteRow(i);
        }
        titlediv.appendChild(newtable);
        that.table.deleteRow(0);

        that.tdiv = titlediv;
        that.bdiv = bodydiv;
    },
    construct: function(table, dest, width, height) {
        var that = this;
        window.onload = function() {
            if (table && typeof table == "string")
                table = document.getElementById(table);
            if (dest && typeof dest == "string")
                dest = document.getElementById(dest);
            else
                dest = document.body;
            width = width || "100%";
            height = height || "300px";
            height = parseInt(height) - table.rows[0].offsetHeight;

            that.table = table;
            that.dest = dest;
            that.width = width;
            that.height = height;

            that.create();
            that.change();
        }
    },
    change: function() {
        var that = this;
        if (that.table.offsetHeight > parseInt(that.height)) {
            that.tdiv.style.width = parseInt(that.bdiv.offsetWidth) - 16;
        }
        else {
            that.tdiv.style.width = parseInt(that.bdiv.offsetWidth);
        }
    }
};

之所以会有一个change方法，是因为在项目当中需要动态改变列表，要计算表头和表体滚动条