function checkcn(){
		if(document.formhy.username.value=="")
			{
				alert("请输入您的用户名!")
				document.formhy.username.focus();
				return false;
			}
		else if(document.formhy.username.value.indexOf("'")>=0)
			{
				alert("用户名中不能包含特殊字符!")
				document.formhy.username.select();
				return false;
			}
		else if(document.formhy.password.value=="")
			{
				alert("请输入您的密码!");
				document.formhy.password.focus();
				return false;
			}
		else
			document.formhy.submit();
			return true;
}


function checken(){
		if(document.formhy.username.value=="")
			{
				alert("pleae input your username!")
				document.formhy.username.focus();
				return false;
			}
		else if(document.formhy.username.value.indexOf("'")>=0)
			{
				alert("pleae check your username!")
				document.formhy.username.select();
				return false;
			}
		else if(document.formhy.password.value=="")
			{
				alert("please input your password!");
				document.formhy.password.focus();
				return false;
			}
		else
			return true;
}