根据数据库中的值用js设置RadioButtonList选中与否

function setcheck(id,ddd)//id表示控件ID号,ddd表示值
  {
    var   radiolist   =  id; 
  
      for(var   i=0;i<document.getElementById(radiolist).rows.length;i++) 
      { 
          for(var   x=0;x<document.getElementById(radiolist).rows[i].cells.length;x++) 
          { 
              if(document.getElementById(radiolist).rows[i].cells[x].firstChild!="undefine") 
              {   
                  if(document.getElementById(radiolist).rows[i].cells[x].firstChild.value==ddd) 
                  { 
                    document.getElementById(radiolist).rows[i].cells[x].firstChild.checked=true; 
                  }
                                            
              } 
          } 
      }
  }