function checkUserName(username){
	if ((username!="")&&(username.match(/[^0-9a-zA-Z\u4E00-\u9FA5]/g,"")==null)){
		return true;
	}else{
		return false;
	}
}

function checkEmail(email){
	var emailFormat=/\w+@\w+.\w+/;
	if ((email!="")&&(emailFormat.test(email))){
		return true;
	}else{
		return false;
	}
}

function checkSearch(searchStr){
	if (searchStr.match(/[^0-9a-zA-Z\u4E00-\u9FA5]/g,"")==null){
		return true;
	}else{
		return false;
	}
}