//This program for 3 rows table

var do_show=0;

function show_hide_column()
{
  var stl;
  var Yearspan;
  var Row0span;
  var Row1span;

  if (do_show)
  { stl = 'block';
    Yearspan="3";
    Row0span="4";
    Row1span="2";
    document.getElementById("HideSE").value="Hide Standard Error";
    do_show=0; //false

  } //if
  else
  { stl= 'none';
    Yearspan = "2";
    Row0span="2";
    Row1span="1";
    document.getElementById("HideSE").value="Show Standard Error";
    do_show=1; //true
  } //else

  

  var tbl=document.getElementById('Table4'); // Identifies the Table
  var rows=tbl.getElementsByTagName('tr');  // array containing 'tr' tags

  var MainTitle=rows[0].getElementsByTagName('th');  // returns array of all 'th' elements for row "0"
  MainTitle[0].rowSpan = Yearspan; //Number of Columns spanned by 'Year'
  MainTitle[1].colSpan = Row0span;   //Number of Columns spanned by 'White'
  MainTitle[2].colSpan = Row0span;   //Number of Columns spanned by 'Black'
  MainTitle[3].colSpan = Row0span;   //Number of Columns spanned by 'Hispanic'


  
  var SubTitle=rows[1].getElementsByTagName('th');  // returns array of all 'th' elements for row "1"
  SubTitle[0].colSpan = Row1span; //number of columns spanned by 'White Male'
  SubTitle[1].colSpan = Row1span; //number of columns spanned by 'White Female'
  SubTitle[2].colSpan = Row1span; //number of columns spanned by 'Black Male'
  SubTitle[3].colSpan = Row1span; //number of columns spanned by 'Black Female'
  SubTitle[4].colSpan = Row1span; //number of columns spanned by 'Hispanic Male'
  SubTitle[5].colSpan = Row1span; //number of columns spanned by 'Hispanic Female'

  var RateSeTitle=rows[2].getElementsByTagName('th');  // returns array of all 'th' elements for row "1"
  RateSeTitle[0].style.display=stl;
  RateSeTitle[1].style.display=stl;
  RateSeTitle[2].style.display=stl;
  RateSeTitle[3].style.display=stl;
  RateSeTitle[4].style.display=stl;
  RateSeTitle[5].style.display=stl;
  RateSeTitle[6].style.display=stl;
  RateSeTitle[7].style.display=stl;
  RateSeTitle[8].style.display=stl;
  RateSeTitle[9].style.display=stl;
  RateSeTitle[10].style.display=stl;
  RateSeTitle[11].style.display=stl;


  for (var row=3; row<rows.length;row++)
  {
  var cels=rows[row].getElementsByTagName('td');  // returns array of all 'td' elements in 'tr'
  cels[1].style.display=stl;
  cels[3].style.display=stl;
  cels[5].style.display=stl;
  cels[7].style.display=stl;
  cels[9].style.display=stl;
  cels[11].style.display=stl;

  }


} //end function show_hide_column