function clearText(field)
{
    if (field.defaultValue == field.value) field.value = '';
    else if (field.value == '') field.value = field.defaultValue;
}


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

function check_reset_password()
{
	var emailRegEx = /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i;

	if (document.getElementById('text_reset_email').value=='')
	{	alert('请输入电邮');	document.getElementById('text_reset_email').focus();	return false }

	if (document.getElementById('text_reset_email').value.search(emailRegEx)	==	-1)
	{	alert('您输入的电邮有误');	document.getElementById('text_reset_email').focus();	return false	}

	return true
}


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

function check_login()
{
	var emailRegEx = /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i;

	if (document.getElementById('text_login_email').value=='')
	{	alert('请输入电邮');	document.getElementById('text_login_email').focus();	return false }

	if (document.getElementById('text_login_email').value.search(emailRegEx)	==	-1)
	{	alert('您输入的电邮有误');	document.getElementById('text_login_email').focus();	return false	}

	if (document.getElementById('text_login_password').value=='')
	{	alert('请输入密码');	document.getElementById('text_login_password').focus();	return false }

	return true
}


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

function check_register()
{
	var emailRegEx = /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i;

	if (document.getElementById('text_register_email').value=='')
	{	alert('请输入电邮');	document.getElementById('text_register_email').focus();	return false }

	if (document.getElementById('text_register_email').value.search(emailRegEx)	==	-1)
	{	alert('您输入的电邮有误');	document.getElementById('text_register_email').focus();	return false	}

	if (document.getElementById('text_register_password_1').value=='')
	{	alert('请输入密码');	document.getElementById('text_register_password_1').focus();	return false	}

	if (document.getElementById('text_register_password_2').value=='')
	{	alert('请重新输入密码');	document.getElementById('text_register_password_2').focus();	return false	}

	if (document.getElementById('text_register_password_1').value!=document.getElementById('text_register_password_2').value)
	{	alert('密码有误');	document.getElementById('text_register_password_2').focus();	return false	}

	if (document.getElementById('text_register_name').value=='')
	{	alert('请输入姓名');	document.getElementById('text_register_name').focus();	return false }


	var answer = confirm("所输入的信息是否正确？")
	if (answer)
	{
	}else{
		return false 
	}

	return true
}

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