function checkonline()
{
	var obj=document.messageform;
	if(obj.company.value=="")
	{
		alert("Please enter the name of company!");
		obj.company.focus();
		return false;
	}
	if(obj.name.value=="")
	{
		alert("Please input contact!");
		obj.name.focus();
		return false;
	}
	if(obj.tel.value=="")
	{
		alert("Please input contact phone number!");
		obj.tel.focus();
		return false;
	}
	if(obj.fax.value=="")
	{
		alert("Please input the fax!");
		obj.tel.focus();
		return false;
	}
	if(obj.email.value=="")
	{
		alert("Please input the email!")
		obj.email.focus();
		return false;
	}
	if(obj.content.value=="")
	{
		alert("Please input the content!");
		obj.content.focus();
		return false;
	}
}