function preselect_checkbox()
	{
		var strTermin = document.getElementById("termin").value ;
		if(strTermin == '1')
		{
		  document.getElementById("termin1").checked = "checked" ;
		}
		if(strTermin == '2')
		{
		  document.getElementById("termin2").checked = "checked" ;
		}
		if(strTermin == '3')
		{
		  document.getElementById("termin3").checked = "checked" ;
		}
		if(strTermin == '4')
		{
		  document.getElementById("termin4").checked = "checked" ;
		}
		if(strTermin == '5')
		{
		  document.getElementById("termin5").checked = "checked" ;
		}
		if(strTermin == '6')
		{
		  document.getElementById("termin6").checked = "checked" ;
		}
		if(strTermin == '7')
		{
		  document.getElementById("termin7").checked = "checked" ;
		}
		if(strTermin == '8')
		{
		  document.getElementById("termin8").checked = "checked" ;
		}
		if(strTermin == '9')
		{
		  document.getElementById("termin9").checked = "checked" ;
		}
		if(strTermin == '10')
		{
		  document.getElementById("termin10").checked = "checked" ;
		}
		if(strTermin == '11')
		{
		  document.getElementById("termin11").checked = "checked" ;
		}
		if(strTermin == '12')
		{
		  document.getElementById("termin12").checked = "checked" ;
		}
		if(strTermin == '13')
		{
		  document.getElementById("termin13").checked = "checked" ;
		}
		if(strTermin == '14')
		{
		  document.getElementById("termin14").checked = "checked" ;
		}
		
	}