function getValue(Field) {
	fieldType = Field.type;

	if (fieldType == "text") {
		return getTextValue(Field);
	} else if (fieldType == "hidden") {
		return getTextValue(Field);
	} else if (fieldType == "select-one") {
		return getListValue(Field);
	} else if (fieldType == "textarea") {
		return getTextValue(Field);
	} else if (fieldType == "file") {
		return getTextValue(Field);
	} else if (fieldType == "password") {
		return getTextValue(Field);
	} else if (fieldType == "checkbox") {
		return getCheckboxValue(Field);
	} else if (isNaN(fieldType)) {
		return getRadioValue(Field);
	} else {
		return getTextValue(Field);
	}
}

function isEmptyField(Field) {
	fieldType = Field.type;

	if (fieldType == "text") {
		return isEmptyText(Field);
	} else if (fieldType == "hidden") {
		return isEmptyText(Field);
	} else if (fieldType == "file") {
		return isEmptyText(Field);
	} else if (fieldType == "select-one") {
		return isEmptyList(Field);
	} else if (fieldType == "textarea") {
		return isEmptyText(Field);
	} else if (fieldType == "password") {
		return isEmptyText(Field);
	} else if (fieldType == "checkbox") {
		return isEmptyCheckbox(Field)
	} else if (isNaN(fieldType)) {
		return isEmptyRadio(Field)
	} else {
		return isEmptyText(Field);
	}
}

function isEmail(Field) {
	strValue = getValue(Field);

	regexp = /^([^$@\\ ]+)@((([^$@\\ \.]+)\.)+)([A-Za-z0-9]+)$/
	if (isEmpty(strValue)) {
		return false;
	}
	return regexp.test(strValue);
}	

function getTextValue(Field) {
	return Field.value;
}

function getCheckboxValue(Field) {

	if (Field.checked) return Field.value;
	return '';
}

function getRadioValue(Field) {
	found = false;

	if(isNaN(Field.length)) {
		return Field.value;
	}	

	for(i=0; i< Field.length; i++) {
		if ( Field[i].checked ) {
			return Field[i].value;
			break;
		}
	}	
	return !found;
}


function isEmpty(s) {
        if (s == null || trim(s) == '') {
       	return true;
	}else{
	  return false;
	}
}

function trim(str) {
       while (str.substring(0,1) == " ") {
		str = str.substring(1,str.length);
	}
	while (str.substring(str.length-1,str.length) == " ") {
		str = str.substring(0,str.length-1);
	}
	return str;
}

/*********************************************************************************/
function getCookie(c_name){

if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1;
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    }
  }
return "";

}

/*********************************************************************************/
function setCookie(c_name,value,expiredays){

var exdate=new Date();
exdate.setDate(exdate.getDate()+expiredays);
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString());

}

/*********************************************************************************/
function checkCookie(){

username=getCookie('username');
if (username!=null && username!="")
  {
  alert('Welcome again '+username+'!');
  }
else
  {
  username=prompt('Please enter your name:',"");
  if (username!=null && username!="")
    {
    setCookie('username',username,365);
    }
  }
  
}

/*********************************************************************************/
function deleteCookie(name) {
	setCookie(name,"",-1);
}

/*********************************************************************************/