function setActiveCSSClassName(className)
{
	var contentAreaElement = document.getElementById('cnt_area');

	if (contentAreaElement) {
		contentAreaElement.className = className;
	}
}

function IsEmpty(aTextField) {
   if ((aTextField.value.length==0) ||
   (aTextField.value==null)) {
      return true;
   }
   else { return false; }
}

function clearTXT(txtField , stdString)
{
	if(!IsEmpty(txtField) && txtField.value == stdString){
		txtField.value = '';
	}
}

function addTXT(txtField , stdString)
{
	if(IsEmpty(txtField)){
		txtField.value = stdString;
	}
}