function checkmail()
{
    var email=document.myform.email.value
	re=/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/; 
	if (re.test(email)==true) 
    {
		return true;}
    else
    {
        alert('Error!');
        return false;
    }
}

function checksearch()
{
    var searchKey=document.myform1.searchKey.value
    if (searchKey != "")
    {return true;}
    else
        {
        alert('Please input product name or keywordsŁĄ');
        return false;
        }
}