function checkInput()
{
	var error_string = "";
	if (document.frmSize.size.value == 0)
	{
		error_string += "Please select size for your product.\n";	
	}
	if (document.frmSize.sku.value == 0)
	{
		error_string += "Please select style for your product.\n";			
	}
	
	if(error_string == "")
	{
		return true;
	}
	else
	{
		error_string = "We found the following error in your form:\n" + error_string;			
		alert(error_string);
		return false;
	}	
}