function validate(t)
{
	var selectedCombobox=(t.SearchBox.value);
	
 //For Activity
if (selectedCombobox=="1") {	
	if(t.activity_val.value=="")
	{
		alert("Please Choose an Activity");
		t.activity.focus();
		return false;
	}
}

 //For Destination
if (selectedCombobox=="2") {	
	if(t.country_val.value=="")
	{
		alert("Please Choose an Country");
		t.country.focus();
		return false;
	}
}

 //For Activity + Destination
 else if (selectedCombobox=="3") {
	 	if(t.activity_val_sort.value=="")
	{
		alert("Please Choose an Activity");
		t.activity_sort.focus();
		return false;
	}	
	
		if(t.country_val_sort.value=="")
	{
		alert("Please Choose an Destination");
		t.country_sort.focus();
		return false;
	}
}

 //For Destination + Activity
 else if (selectedCombobox=="4") {

		if(t.opp_country_val_sort.value=="")
	{
		alert("Please Choose an Destination");
		t.opp_country_sort.focus();
		return false;
	}

	 	if((t.opp_activity_sort.value=="Activities..") || (t.opp_activity_sort.value==""))
	{
		alert("Please Choose an Activity");
		t.opp_activity_sort.focus();
		return false;
	}			
}
	
 //For Company
if (selectedCombobox=="5") {	
	if(t.company_val.value=="")
	{
		alert("Please Choose an Company");
		t.company.focus();
		return false;
	}
}

 return true;	
}