/* Texfields blanking & resetting to instruction text

- Operates by passing a value from the onClick event to the function.
  This value is the text that appears inside the text field. On click, the
  text is blanked, on blur it is reset to whatever was passed. Values in the
  field are checked first to ensure if user enters text that it is kept and not
  blanked back to default or cleared.
*/
	function clearTextField(TFText){
		if(TFText.value==TFText.defaultValue){//Check that field has not changed from default value.
			TFText.value= '';
		}
	}
	
	function setTextField(TFText){
		if(TFText.value == ''){//Check for blank field
			TFText.value = TFText.defaultValue;	//If so, fill back in with auto text
		}
	}