function checkTanker(){
		
	var isChecked = 0;
	var myRadioTanker = document.getElementsByName('theTanker');
	for (i = 0; i <2; i++)
	{
        if (myRadioTanker[i].checked)
		{
          //var payment_t = myRadioTanker[i].value;
		  isChecked = 1;
        }
    }
	if(isChecked){ return true;}
	else{ 
	   	  
	   showContent('tankerMessage', "<font color='#ffffff'>Please select tanker type!</font>");
	   setTimeout("cleanContent('tankerMessage')", 5000);
	   return false;
	}
	
}


function cleanContent(idDiv){
	document.getElementById(idDiv).style.display = "none";
}

//--------------------------------------------------------------------------------------------------------------------//

function showContent(idDiv, theMessage)
{
	 document.getElementById(idDiv).innerHTML = theMessage;
	 document.getElementById(idDiv).style.display = "";
}