function ValidateQuantity(qty,addToCart)
{
//debugger;
    var txtBoxQty = document.getElementById(qty);
    
    var val = parseInt(txtBoxQty.value, 10)
    
    if( val < 1 || isNaN(val) )
    {
        alertDrawerError('please enter a quantity between 1 and 999');
	    return false;
    }
    else
    {
        __doPostBack(addToCart, '');
        return true;
    }
}