function div_1() 
{
  document.write("<div id=layer1 style='position:absolute; top:100; left:-800; width:700; height:300; z-index:3; display:none'>");
}

function div_2() 
{
  document.write("</div>");
}


function div_3() 
{
  document.write("<div id=layer1 style='position:absolute; top:0; left:-800; width:700; height:70; z-index:2; display:none'>");
}