js table select checkbox 操作

//1.判断select选项中 是否存在Value="paraValue"的Item 
function jsSelectIsExitItem(objSelect,objItemValue) 
{ 
    var isExit = false; 
    for(var i=0;i<objSelect.options.length;i++) 
    { 
        if(objSelect.options[i].value == objItemValue) 
        { 
            isExit = true; 
            break; 
        } 
    }      
    return isExit; 
} 
 
//2.向select选项中 加入一个Item 
function jsAddItemToSelect(objSelect,objItemText,objItemValue) 
{ 
    //判断是否存在 
    if(jsSelectIsExitItem(objSelect,objItemValue)) 
    { 
        alert("该Item的Value值已经存在"); 
    } 
    else 
    { 
        var varItem = new Option(objItemText,objItemValue); 
//      objSelect.options[objSelect.options.length] = varItem; 
        objSelect.options.add(varItem); 
        alert("成功加入"); 
    }    
} 
 
//3.从select选项中 删除一个Item 
function jsRemoveItemFromSelect(objSelect,objItemValue) 
{ 
    //判断是否存在 
    if(jsSelectIsExitItem(objSelect,objItemValue)) 
    { 
        for(var i=0;i<objSelect.options.length;i++) 
        { 
            if(objSelect.options[i].value == objItemValue) 
            { 
                objSelect.options.remove(i); 
                break; 
            } 
        }        
        alert("成功删除");            
    } 
    else 
    { 
        alert("该select中 不存在该项"); 
    }    
} 
 
//4.修改select选项中 value="paraValue"的text为"paraText" 
function jsUpdateItemToSelect(objSelect,objItemText,objItemValue) 
{ 
    //判断是否存在 
    if(jsSelectIsExitItem(objSelect,objItemValue)) 
    { 
        for(var i=0;i<objSelect.options.length;i++) 
        { 
            if(objSelect.options[i].value == objItemValue) 
            { 
                objSelect.options[i].text = objItemText; 
                break; 
            } 
        }        
        alert("成功修改");            
    } 
    else 
    { 
        alert("该select中 不存在该项"); 
    }    
} 
        
//5.设置select中text="paraText"的第一个Item为选中 
function jsSelectItemByValue(objSelect,objItemText) 
{    
    //判断是否存在 
    var isExit = false; 
    for(var i=0;i<objSelect.options.length;i++) 
    { 
        if(objSelect.options[i].text == objItemText) 
        { 
            objSelect.options[i].selected = true; 
            isExit = true; 
            break; 
        } 
    }      
    //Show出结果 
    if(isExit) 
    { 
        alert("成功选中");            
    } 
    else 
    { 
        alert("该select中 不存在该项"); 
    }    
} 
 
//6.设置select中value="paraValue"的Item为选中 
//document.all.objSelect.value = objItemValue; 
 
//7.得到select的当前选中项的value 
//var currSelectValue = document.all.objSelect.value; 
 
//8.得到select的当前选中项的text 
//var currSelectText = document.all.objSelect.options[document.all.objSelect.selectedIndex].text; 
 
//9.得到select的当前选中项的Index 
//var currSelectIndex = document.all.objSelect.selectedIndex; 
 
//10.清空select的项 
// document.all.objSelect.options.length = 0; 

/////////////////////////////

向Select里添加Option
function fnAddItem(text,value)
           {
             var selTarget = document.getElementById("selID");

             selTarget.Add(new Option("text","value"));
         }


2、删除Select里的Option
function fnRemoveItem()
           {
             var selTarget = document.getElementById("selID");

             if(selTarget.selectedIndex > -1)
               {//说明选中
                 for(var i=0;i<selTarget.options.length;i++)
                   {
                     if(selTarget.options[i].selected)
                       {
                         selTarget.remove(i);
                        
                         i = i - 1;//注意这一行
                     }
                 }
             }
         }
3、移动Select里的Option到另一个Select中
         function fnMove(fromSelectID,toSelectID)
           {
             var from = document.getElementById(fromSelectID);
             var to = document.getElementById(toSelectID);
            
             for(var i=0;i<from.options.length;i++)
               {
                 if(from.options[i].selected)
                   {
                     to.appendChild(from.options[i]);
                     i = i - 1;
                 }
             }
         }
    if 里的代码也可用下面几句代码代替

   var op = from.options[i];
   to.options.add(new Option(op.text, op.value));
   from.remove(i);
4、Select里Option的上下移动
         function fnUp()
           {  
             var sel = document.getElementById("selID");
             for(var i=1; i < sel.length; i++)
               {//最上面的一个不需要移动，所以直接从i=1开始
                 if(sel.options[i].selected)
                   {
                     if(!sel.options.item(i-1).selected)
                       {//上面的一项没选中，上下交换
                           var selText = sel.options[i].text;
                           var selValue = sel.options[i].value;
                          
                           sel.options[i].text = sel.options[i-1].text;
                           sel.options[i].value = sel.options[i-1].value;
                           sel.options[i].selected = false;
                          
                           sel.options[i-1].text = selText;
                           sel.options[i-1].value = selValue;
                           sel.options[i-1].selected=true;
                     }
                 }
             }
         }
在进行上下两项互换时，也可以使用以下代码，但是效率很低，因为每一次的Dom操作都将导致整个页面的重新布局，所以不如直接修改元素的属性值。
                         var oOption = sel.options[i]
                         var oPrevOption = sel.options[i-1]
                         sel.insertBefore(oOption,oPrevOption);
向下移动同理
function fnDown()
           {
             var sel = fnGetTarget("selLeftOrRight");
             for(var i=sel.length -2; i >= 0; i--)
               {//向下移动，最后一个不需要处理，所以直接从倒数第二个开始
                 if(sel.options.item(i).selected)
                   {
                     if(!sel.options.item(i+1).selected)
                       {//下面的Option没选中，上下互换
                           var selText = sel.options.item(i).text;
                           var selValue = sel.options.item(i).value;
                          
                           sel.options.item(i).text = sel.options.item(i+1).text;
                           sel.options.item(i).value = sel.options.item(i+1).value;
                           sel.options.item(i).selected = false;
                          
                           sel.options.item(i+1).text = selText;
                           sel.options.item(i+1).value = selValue;
                           sel.options.item(i+1).selected=true;
                     }
                 }
             }
         }
5、Select里Option的排序
这里借助Array对象的sort方法进行操作，sort方法接受一个function参数，可以在这个function里定义排序时使用的算法逻辑。
array.sort([compareFunction]) 里compareFunction接受两个参数(p1,p2)，sort操作进行时，array对象会每次传两个值进去，进行比较； compareFunciton必须返回一个整数值：当返回值>0时，p1会排在p2后面；返回值<0时，p1会排在p2前面；返回值=0 时，不进行操作。
例如：
function fnCompare(a,b)
           {
             if (a < b)
                 return -1;
             if (a > b)
                 return 1;
             return 0;
         }
var arr = new Array();
//add some value into arr
arr.sort(fnCompare);
//这里sort的操作结果就是arr里的项按由小到大的升序排序
//如果把fnCompare里改为
//if (a < b)
//  return 1;
//if (a > b)
//  return -1;
//return 0;
//则sort的结果是降序排列

好，下面就是对Select里Option的排序
//因为排序可以按Option的Value排序，也可以按Text排序，这里只演示按Value排序
function sortItem()
   {
     var sel = document.getElementById("selID");
     var selLength = sel.options.length;
     var arr = new Array();
     var arrLength;

     //将所有Option放入array
     for(var i=0;i<selLength;i++)
       {
         arr[i] = sel.options[i];
     }
     arrLength = arr.length;

     arr.sort(fnSortByValue);//排序
     //先将原先的Option删除
     while(selLength--)
       {
         sel.options[selLength] = null;
     }
     //将经过排序的Option放回Select中
     for(i=0;i<arrLength;i++)
       {
         sel.add(new Option(arr[i].text,arr[i].value));
     }
}
function fnSortByValue(a,b)
   {
     var aComp = a.value.toString();
     var bComp = b.value.toString();

     if (aComp < bComp)
         return -1;
     if (aComp > bComp)
         return 1;
     return 0;
}

==========================================

/********************************
* table methods
*********************************/
bes.table={
    //find whether there be one selected checkbox
    checkHasSelectedBoxes:function(ele, name){
        var table = bes.table.getParentTable(ele);
        if(!table)return false;
        var chks = bes.table.getFirstCheckboxes(table, name);
        if(!chks)return false;
        if(chks.length < 1)return false;
        if(chks.length == 1 && chks[0] == ele)return false;
        for(var i=0;i<chks.length-1;i++){
            if(!chks[i].disabled)return true;
        }
        return false;
    },
    //get all selected checkboxs
    getSelectedCheckboxs:function(table, name){
        var chks = this.getFirstCheckboxes(table, name);
        var arr = new Array();
        for(var i = 0; i < chks.length-1; i ++){
            if(!chks[i].checked)continue;
            arr[arr.length] = chks[i];
        }
        return arr;
    },
    //get all checkboxes(selected or not)
    getCheckboxSelects:function(table, name){
        var chks = this.getFirstCheckboxes(table, name);
        return chks.slice(0, chks.length - 1);
    },
    //get checkbox in the first cell of head rows
    getCheckboxAllSelect:function(table, name){
        var chks = this.getFirstCheckboxes(table, name);
        return chks[chks.length - 1];
    },
    //get table checkbox selection status, with has checked and all checked status
    getCheckboxStatus:function(table, name, checkbox){
        var chks = this.getFirstCheckboxes(table, name);
        var allCheck = chks[chks.length-1];
        allCheck.checked=checkbox?checkbox.checked:true;
        var hasChecked = false;
        for(var i = chks.length - 2; i >=0; i --){
            if(chks[i].disabled)continue;
            if(chks[i].checked){
                hasChecked=true;
            }else{
                allCheck.checked = false;
            }
        }
        return {
            allChecked:allCheck.checked,
            hasChecked:hasChecked
        };
    },
    //
    selectCheckboxAll:function(checkbox, name){
        var table = this.getParentTable(checkbox);
        var chks = this.getFirstCheckboxes(table, name);
        for(var i = chks.length - 2; i >=0; i --){
            if(chks[i].disabled)continue;
            this.selectCheckbox(chks[i], checkbox.checked);
        }
    },
    selectCheckbox:function(chk, checked){
        var c = checked;
        if(null == checked)c = chk.checked;
        var row = this.getParentNode(chk, "TR");
        if(c){
            bes.addClass(row, "SelectedRow");
        }else{
            bes.delClass(row, "SelectedRow");
        }
        row._selected_ = c;
        if(null != checked)chk.checked = checked;
    },
    onSelectCheckbox:function(checkbox){
        this.selectCheckbox(checkbox);
        var table = this.getParentTable(checkbox);
        return this.getCheckboxStatus(table, checkbox.name, checkbox);
    },
    getParentNode:function(node, tag){
        do{
            if(node.tagName)if(node.tagName.toUpperCase()==tag){
                return node;
            }
            node = node.parentNode;
        }while(node);
        return false;
    },
    getParentTable:function(node){
        return bes.table.getParentNode(node, "TABLE");
    },
    getFirstCheckboxes:function(table, name){
        var rs = table.rows;
        var chks = new Array();
        var chkAll = false;
        for(var i=0; i < rs.length; i ++){
            var cs = rs[i].cells;
            for(var j=0; j < 2 && j < cs.length; j ++){
                var ns = cs[j].childNodes;
                for(var k=0; k<ns.length; k ++){
                    var n = ns[k];
                    if(n.type!="checkbox")continue;
                    if(n.name!=name){
                        if(!chkAll && i == 0 && (!n.name || n.name=="")){
                            chkAll = n;
                        }
                        continue;
                    }
                    chks.push(n);
                    ns=false;
                    break;
                }
                if(!ns)break;
            }
        }
        chks.push(chkAll);
        return chks;
    },
    getSorter:function(table, thbase){
        if(table.data)return table.data;
        table.$ = table.getElementsByTagName;
        function parseInner(inner){
            inner = inner + "";
            var idx = inner.indexOf("<!--");
            if(idx < 0)return [inner];
            return [inner.substring(0, idx).split("&nbsp;").join(" ").trim(),
            inner.substring(idx + 4).replace("-->", "").replaceAll("&nbsp;", " ").trim()];
        }
        function sortChar(asc){
            return "&nbsp;<span class='TableSorter'>" + String.fromCharCode(9655 - 5 * asc) + "</span>"
        }
        function getTableHeaders(table, thbase){
            var headers = table.$("THEAD")[0].getElementsByTagName("TR")[0].getElementsByTagName("TH");
            for(var i = 0; i < headers.length; i ++){
                var h = headers[i];
                var d = parseInner(h.innerHTML);
                if(d.length < 2)continue;
                d = {
                    label:d[0],
                    type:d[1],
                    idx:i
                };
                d.sort=0;//0 --null/1 --asc/-1 --desc
                h.d = d;
                h.d.table = table;
                h.innerHTML=d.label;
                h.onclick=function(){
                    if(!this.d)return;
                    this.d.table.data.sort(this.d.idx);
                }
            }
            for(var i = 0; i < headers.length; i ++){
                var h = headers[i];
                if(!h.d)continue;
                if(h.d.type.charAt(0) == "&"){
                    var v = parseInt(h.d.type.substring(1)) + thbase;
                    v = headers[v];
                    if(v.d){
                        h.d.as = v;
                    }else{
                        h.d = false;
                    }
                }
            }
            return headers;
        }
        function getTableRows(table){
            table.data.tbody = table.$("TBODY")[0];
            var rows = table.data.tbody.getElementsByTagName("TR");
            table.data.rows = [];
            var headers = table.data.headers;
            for(var i = 0; i < rows.length; i ++){
                var row = rows[i];
                table.data.rows.push(row);
                row.cs = row.getElementsByTagName("TD");
                for(var j=0; j<row.cs.length; j ++){
                    var h = headers[j];
                    if(!h || !h.d || h.d.as)continue;
                    var c = row.cs[j];
                    c.v = parseInner(c.innerHTML);
                    if(c.v.length < 2){
                        c.v = c.v[0];
                    }else{
                        c.v = c.v[1];
                    }
                    if(h.d.type == "num"){
                        try{
                            c.v = parseInt(c.v);
                        }catch(e){
                            c.v = null;
                        }
                        if(isNaN(c.v))c.v=null;
                    }
                }
            }
        }
        table.data = {
            headers:getTableHeaders(table, thbase?thbase:0)
        };
        getTableRows(table);
        table.data.sorter = function(r1, r2){
            var ss = table.data.sorters;
            for(var i = 0; i < ss.length; i ++){
                var d = ss[i].d;
                var v1 = r1.cs[d.idx].v;
                var v2 = r2.cs[d.idx].v;
                if(v1 == v2)continue;
                if(!v1)return -1 * d.sort;
                if(!v2)return 1 * d.sort;
                return (v1 > v2?1:-1) * d.sort;
            }
            return 0;
        };
        table.data.sorters = [];
        table.data.rowsort = function(){//[h...]
            var hs = table.data.sorters;
            for(var i = hs.length - 1; i >= 0; i --){
                var h = hs[i];
                if(i==0){
                    h.innerHTML = h.d.label + sortChar(h.d.sort);
                }else{
                    h.innerHTML = h.d.label;
                }
            }
            this.rows.sort(this.sorter);
        };
        table.data.initSorters = function(opts){
            var hs = [].concat(this.sorters);
            hs.reverse();
            for(var i=opts.length - 1; i >=0; i --){
                var opt = opts[i];
                if(!opt && opt != 0)continue
                if(!opt.idx){
                    opt={
                        idx:opt
                    };
                }
                if(!opt.sort){
                    opt.sort="r";
                }
                var h = this.headers[opt.idx];
                if(!h.d)continue;
                if(h.d.as)h=h.d.as;
                for(var j = 0; j < hs.length; j ++){
                    if(hs[j] == h)hs[j] = false;
                }
                switch(opt.sort){
                    case "a": h.d.sort=1; break;
                    case "d": h.d.sort=-1; break;
                    default://r
                        if(h.d.sort == 0){
                            h.d.sort=1;
                        }else {
                            h.d.sort=0 - h.d.sort;
                        }
                }
                hs.push(h);
            }
            this.sorters = [];
            for(var i = hs.length - 1; i >= 0; i --){
                var h = hs[i];
                if(!h)continue;
                this.sorters.push(h);
            }
        };
        table.data.sort = function(){
            this.initSorters(arguments);
            this.rowsort();
            var inputs = table.$("INPUT");
            var selected = [];
            for(var i = 0; i < inputs.length; i ++){
                var ipt = inputs[i];
                if(ipt.checked)selected.push(ipt);
            }
            //rebuild table
            for(var i = 0; i < this.rows.length; i ++){
                var r = this.rows[i];
                this.tbody.removeChild(r);
                this.tbody.appendChild(r);
                bes.delClass(r, "Row" + (i % 2 - 1));
                bes.addClass(r, "Row" + (i % 2));
            }
            for(var i = 0; i < selected.length; i ++){
                selected[i].checked = true;
            }
        };
        return table.data;
    },
    initSorter:function(ele, thbase, thidx){
        var t =bes.table.getParentTable(ele);
        bes.table.getSorter(t, thbase);
        t.data.sort(thbase + thidx);
    },
    currow:null,
    overRow:function(row){
        if(this.currow)this.outRow(this.currow);
        this.currow = row;
        bes.addClass(row, "CurrentRow");
    },
    outRow:function(row){
        bes.delClass(row, "CurrentRow");
        this.currow = null;
    }
}

=========================================
/********************************
* remove rows of properties table
*********************************/
bes.removeRow=function(table,name){
    try{
        for(var i=table.rows.length - 1; i > 0 ; i --){
            var row = table.rows[i];
            var chx = row.cells[0].childNodes[0];
            if(null != chx && chx.checked){
                table.deleteRow(i);
            }else if(row._selected_){
                table.deleteRow(i);
            }
        }
        var status=bes.table.getCheckboxAllSelect(table,name);
        bes.table.selectCheckbox(status, false);
    }catch(e){}
    bes.setRowClass(table);
}
/********************************
* remove all rows of Properties table
*********************************/
bes.removeAllRows=function(table,name){
    try{
        for(var i=table.rows.length - 1; i > 0 ; i --){
            table.deleteRow(i);
        }
        var status=bes.table.getCheckboxAllSelect(table,name);
        bes.table.selectCheckbox(status, false);
    }catch(e){}
}