js table 操作-----实现table的插入、修改、删除

<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
< HTML >
< HEAD >
< TITLE >  New Document  </ TITLE >
< META  NAME ="Generator"  CONTENT ="EditPlus" >
< META  NAME ="Author"  CONTENT ="" >
< META  NAME ="Keywords"  CONTENT ="" >
< META  NAME ="Description"  CONTENT ="" >
</ HEAD >
< script >
    var flg=false;
    var selectedColor = "#99CCCC";
    var initColor = "#ffff99";
    var selectedRowIndex = "";
    var editObj;
    function add(){
        var cell;
        var textNode;
        // add head
        var type = document.getElementsByName("type")[0];
        head = type.options[type.selectedIndex].text;
        //check exist
        var hiddenHeads = document.getElementsByName("hiddenHead");
        for(i=0;i<hiddenHeads.length;i++){
            if(hiddenHeads[i].value == type.value){
                alert("这个类型的记录已经存在");
                return ;
            }
        }
        //add row
        tbl = document.getElementById("paramTbl");
        rowsLen = tbl.rows.length;
        row = tbl.insertRow(rowsLen);        
        
        //create head tag
        textNode = document.createTextNode(head);        
        cell = row.insertCell(0)
        cell.setAttribute("hight","22");
        cell.appendChild(textNode);        
        row.appendChild(cell);        
        //add param tag
        for(i=1;i<4;i++){            
            paramValue = document.getElementsByName("param"+i)[0].value;
            textNode = document.createTextNode(paramValue);            
            cell = row.insertCell(i)
            cell.setAttribute("hight","22");
            cell.appendChild(textNode);
            row.appendChild(cell);             
        }
        //add head value
        hiddenHead = document.createElement("<input type='hidden' name='hiddenHead' value='"+type.value+"'/>");        
        cell = row.insertCell(4)        
        cell.setAttribute("hight","22");
        cell.appendChild(hiddenHead);
        row.appendChild(cell);
        //add param value
        for(i=5;i<8;i++){
            paramValue = document.getElementsByName("param"+(i-4))[0].value;
            hidden = document.createElement("<input type='hidden' name='hiddenParam"+(i-4)+"' value='"+paramValue+"'/>");
            cell = row.insertCell(i)
            cell.style.display='none';
            cell.appendChild(hidden);
            row.appendChild(cell);   
        }

        row.onclick=function(){rowClick(this);};
        row.bgColor = initColor;
        init();
    }
    function edit(){
        tbl = document.getElementById("paramTbl");
        if(selectedRowIndex==""){
            alert("please select a row");
            return ;
        }
        for(i=1;i<4;i++){
            paramObj = document.getElementsByName("param"+i)[0];
            hiddenObj = document.getElementsByName("hiddenParam"+i)[selectedRowIndex-1];
            hiddenObj.value = paramObj.value;
            editObj.cells[i].innerText=paramObj.value;
        }
        init();
    }
    function del(){
        tbl = document.getElementById("paramTbl");
        tbl.deleteRow(selectedRowIndex);
        selectedRowIndex = "";
        init();

    }
    function rowClick(obj){
        tbl = document.getElementById("paramTbl");
        if(selectedRowIndex != ""){
            tbl.rows[selectedRowIndex].bgColor = initColor;
        }
        selectedRowIndex = obj.rowIndex;
        obj.bgColor = selectedColor;
        //reset select 
        var type = document.getElementsByName("type")[0];
        var hiddenHead = document.getElementsByName("hiddenHead")[selectedRowIndex-1];        
        var opts = type.options;
        if(flg){
        alert(selectedRowIndex-1);
        alert(hiddenHead);
        alert(hiddenHead.value);
        }
        for(i=0;i<opts.length;i++){    
            if(opts[i].value == hiddenHead.value ){
                opts[i].selected = true;
            }
        }
        //copy param value
        for(i=1;i<4;i++){
            paramObj = document.getElementsByName("param"+i)[0];
            hiddenObj = document.getElementsByName("hiddenParam"+i)[selectedRowIndex-1];            
            paramObj.value = hiddenObj.value;
            //alert(hiddenObj.value);
        }
        editObj=obj;
    }
    function init(){
        for(i=1;i<4;i++){            
            param = document.getElementsByName("param"+i)[0];
            param.value="";
        }
        var type = document.getElementsByName("type")[0];
        type.options[0].selected=true;
    }
    function test(){
        
        hiddenObjs = document.getElementsByName("hiddenParam1")
        for(i=0;i<hiddenObjs.length;i++){
            alert(hiddenObjs[i].value);
        }
        var hiddenHeads = document.getElementsByName("hiddenHead");    
        for(i=0;i<hiddenHeads.length;i++){
            alert(hiddenHeads[i].value);
        }
    }
    function test2(){
        if(flg){
            flg=false;
        }else{
            flg=true;
        }
    }
    function reset(){
        tbl = document.getElementById("paramTbl");
        if(selectedRowIndex!=""){
            tbl.rows[selectedRowIndex].bgColor = initColor;
            selectedRowIndex="";
        }
        for(i=1;i<4;i++){            
            param = document.getElementsByName("param"+i)[0];
            param.value="";
        }
    }

</ script >
< BODY >
     < div  style ="height:132px; width:100%; overflow-x:auto; overflow-y:auto; background-color:#ffff99;"   >
     < table  id ="paramTbl"  width ="100%" >
         < tr >
             < td > 类型 </ td >
             < td > 参数1 </ td >
             < td > 参数二 </ td >
             < td > 参数三 </ td >
         </ tr >
     </ table >
     </ div >
     < table >
         < tr >
             < td >
                 < select  name ="type"  onchange ="reset()" >
                     < option  value ="typeA" > 类型A </ option >
                     < option  value ="typeB" > 类型B </ option >
                 </ select >
             </ td >
             < td >
                 < input  type ="text"  name ="param1" />
             </ td >
             < td >
                 < input  type ="text"  name ="param2" />
             </ td >
             < td >
                 < input  type ="text"  name ="param3" />
             </ td >
         </ tr >
         < tr >
             < td >< input  type ="button"  onclick ="add()"  value ="add" /></ td >
             < td >< input  type ="button"  onclick ="edit()"  value ="edit" /></ td >
             < td >< input  type ="button"  onclick ="del()"  value ="del" /></ td >
             < td > <!-- <input type="button" onclick="test()" value="test"/> --> </ td >
         </ tr >
     </ table >
     <!--
<td><input type="button" onclick="test2()" value="test2"/></td>
<td><input type="button" onclick="alert(selectedRowIndex)" value="test2"/></td>
-->
</ BODY >
</ HTML >