function validateForm(){
	if(document.getElementById("ctl00_ContentPlaceHolder1_txtHAWB").value == "" && document.getElementById("ctl00_ContentPlaceHolder1_txtShipRef").value == ""){
		showMessage('Please enter HAWB or shipper ref number.',"lblMessage")
		return false;
	}
	if(document.getElementById("ctl00_ContentPlaceHolder1_txtHAWB").value.length != 0 && document.getElementById("ctl00_ContentPlaceHolder1_txtShipRef").value.length != 0){
		showMessage('Only enter a HAWB OR a shipper ref number.')
		return false;
	}
	return true;

}
function showMessage(strText) 
	{
		var objLabel = document.getElementById('ctl00_ContentPlaceHolder1_lblMessage')
			
		if (objLabel == null) 
			{
				alert('Unable to find error message label...')
				return
			} else {
				objLabel.innerHTML = strText
				objLabel.style.color = 'red'
			}
	}