HTML(1)纯js显示隐藏对应的控件

var frame_btn =document.getElementById('onshow');

var x = document.getElementById("myframe");
x.onclick=hide;
frame_btn.onclick=show;
function show()
{

  if(document.getElementById("myframe").style.display=='none'){
document.getElementById("myframe").style.display = "block";
  }
  else{
  document.getElementById("myframe").style.display = "none";
  }

}

function hide()
{
document.getElementById("myframe").style.display = "none";
}