js 技巧

function expand(el)
{
 childObj = document.getElementById(el);
 if (childObj.style.display == 'none')
 {
  childObj.style.display = 'block';
 }
 else
 {
  childObj.style.display = 'none';
 }
 return;
}

 

2. Table:

function showPlan(){
    var planTable=document.getElementById("myplan");
    var trs=planTable.getElementsByTagName('TR');
    var maxLen=trs.length-1;
    for(var i=0;i<maxLen;i++){
     if(i>2){
      var colsTD =trs[i].getElementsByTagName('TD');
      var colsLen=colsTD.length;
      for(var j=0;j<colsLen;j++){
       if(colsTD[j].style.display=="none"){
        colsTD[j].style.display="block";
       }
       else{
        colsTD[j].style.display="none";
       }
      }
     }
    }
   }

<TABLE  id="myplan" style="display:none;">

 

 

 

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