function empty(str){
		var empty_chk=/(^[\ ]*$)/i;
		if(!empty_chk.test(str))return false;
		return(true);
	}

	function getFieldValue(field){
	   switch(field.type){
		  case "text" :
		  case "textarea" :
		  case "password" :
		  case "hidden" :
			 return field.value;
	
		  case "select-one" :
			 var i = field.selectedIndex;
			 if (i == -1)   return "";
			 else   return field.options[i].value ;
		  case "select-multiple" :
			 var allChecked = new Array();
			 for(i = 0; i < field.options.length; i++)
				if(field.options[i].selected)
				   allChecked[allChecked.length] = (field.options[i].value == "") ? field.options[i].text : field.options[i].value;
			 return allChecked;
	
		  case "button" :
		  case "reset" :
		  case "submit" :
			 return "";
	
		  case "radio" :
		  case "checkbox" :
			 if (field.checked) { return field.value; } else { return ""; }
		  default :
			 if(field[0].type == "radio")
			 {
				for (i = 0; i < field.length; i++)
				   if (field[i].checked)
					  return field[i].value;
	
				return "";
			 }
			 else if(field[0].type == "checkbox")
			 {
				var allChecked = new Array();
				for(i = 0; i < field.length; i++)
				   if(field[i].checked)
					  allChecked[allChecked.length] = field[i].value;
	
				return allChecked;
			 }
			 break;
	   }
	   
	   return "";
	}