function inititemyear(myfrm)
{	 
  var i
  var obj = new Date()
  
	for(i = obj.getYear() - 70 ; i<=obj.getYear(); i++)
	  {
		   document.write("<option value='" + i + "'>" +  i + "</option>\n");
	  }

}



function isleap(year)
{
	if(year % 4 == 0)
	{
	  
	  if( year % 100 != 0)
	    return true;
	  else if(year % 400 == 0)
	    return true;
	  else
	    return false;
	  
	}
	else
	{
	  return false
	}
	
}

function changeyear(myfrm)
{ 
  
  var i, y, m,yval,mval
  
  y = myfrm.m_year.selectedIndex
  yval = myfrm.m_year.options[y].value
  
  m = myfrm.m_month.selectedIndex
  
  if(m != 0)
  {
    for (i=1 ;i<= 31 ;i++)      
      myfrm.m_day.options[i] = new Option(i,i); 
    
    if(m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12)
    {
		myfrm.m_day.length=31+1
    }
    else if(m != 2)
    {
		myfrm.m_day.length=30+1
    }
    if (m == 2)
    {
		if(isleap(yval))
		{
		  myfrm.m_day.length=29+1
		}
		else
		{
		  myfrm.m_day.length=28+1
		}
		
    }
  }
        
}

function changemonth(myfrm)
{

  var i, y, m,yval,mval

  y = myfrm.m_year.selectedIndex
  yval = myfrm.m_year.options[y].value
  
  m = myfrm.m_month.selectedIndex
  
  if(m != 0 && y != 0)
  {
    for (i=1 ;i<= 31 ;i++)      
      myfrm.m_day.options[i] = new Option(i,i); 
    
    if(m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12)
    {
		myfrm.m_day.length=31+1
    }
    else if(m != 2)
    {
		myfrm.m_day.length=30+1
    }
    if (m == 2)
    {
		if(isleap(yval))
		{
		  myfrm.m_day.length=29+1
		}
		else
		{
		  myfrm.m_day.length=28+1
		}
		
    }
  
  }
}