获取document中的元素编程（javascript）

function show(strtype)...{


  document.all.item(strtype).style.display = "block";}




function hide(strtype)...{


  document.all.item(strtype).style.display = "none";}

 

 

 

 


 <SCRIPT type=text/javascript>




    function setTab01Syn(i)...{


        selectTab01Syn(i);


    }




    function selectTab01Syn(i)...{




        switch(i)...{


            case 1:


            document.getElementById("TabTab01Con1").style.display="block";


            document.getElementById("TabTab01Con2").style.display="none";


            document.getElementById("TabTab01Con3").style.display="none";


            break;


            case 2:


            document.getElementById("TabTab01Con1").style.display="none";


            document.getElementById("TabTab01Con2").style.display="block";


            document.getElementById("TabTab01Con3").style.display="none";


            break;


            case 3:


            document.getElementById("TabTab01Con1").style.display="none";


            document.getElementById("TabTab01Con2").style.display="none";


            document.getElementById("TabTab01Con3").style.display="block";


            break;


        }


    }


    </SCRIPT>